Relevant bibliographies by topics / PEEK polymer

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Academic literature on the topic 'PEEK polymer'

Author: Grafiati
Published: 5 June 2025
Last updated: 15 July 2025

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Journal articles on the topic "PEEK polymer"

1

Toro, Sebastián Andrés, Alvaro Ridruejo, Carlos González, Miguel A. Monclús, and Juan P. Fernández-Blázquez. "Optimization of Processing Conditions and Mechanical Properties for PEEK/PEI Multilayered Blends." Polymers 14, no. 21 (2022): 4597. http://dx.doi.org/10.3390/polym14214597.

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The goal of producing polyetheretherketone/polyetherimide (PEEK/PEI) blends is to combine the outstanding properties that both polymers present separately. Despite being miscible polymers, it is possible to achieve PEEK/PEI multilayered blends in which PEEK crystallinity is not significantly inhibited, as opposed to conventional extruding processes that lead to homogeneous mixtures with total polymer chain interpenetration. This study investigated a 50/50 (volume fraction) PEEK/PEI multilayered polymer blend in which manufacturing parameters were tailored to simultaneously achieve PEEK–PEI adhesion while keeping PEEK crystallinity in order to optimize the mechanical properties of this heterogeneous polymer blend. The interface adhesion was characterized with the use of three-point bending tests, which proved that a processing temperature below the melting point of PEEK produced weak PEEK–PEI interfaces. Results from differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and X-ray diffraction analysis (XRD) showed that under a 350 ∘C consolidation temperature, there is a partial mixing of PEEK and PEI layers in the interface that provides good adhesion. The thickness of the mixed homogeneous region at this temperature exhibits reduced sensitivity to processing time, which ensures that both polymers essentially remain separate phases. This also entails that multilayered blends with good mechanical properties can be reliably produced with short manufacturing cycles. The combination of mechanical performance and potential joining capability supports their use in a wide range of applications in the automotive, marine, and aerospace industries.
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Lommen, Julian, Lara Schorn, Christoph Sproll, et al. "Mechanical Fatigue Performance of Patient-Specific Polymer Plates in Oncologic Mandible Reconstruction." Journal of Clinical Medicine 11, no. 12 (2022): 3308. http://dx.doi.org/10.3390/jcm11123308.

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Mandible defects are conventionally reconstructed using titanium plates. However, titanium causes metallic artifacts which impair radiological imaging. This study aims at evaluating mechanical fatigue of radiolucent fiber-reinforced polyetheretherketone (f-PEEK), polyetheretherketone (PEEK), polyetherketoneketone (PEKK), and polyphenylsulfone (PPSU) polymer plates for mandible reconstruction. A total of 30 plates (titanium [n = 6], f-PEEK [n = 6], PEEK [n = 6], PEKK [n = 6], PPSU [n = 6]) were implanted in synthetic mandibulectomized polyurethane mandibles. Servo-pneumatic mechanical testing with cyclic application of 30–300 N at 3 Hz was conducted. Bite forces were 70% on the unresected and 30% on the resected side. Total number of cycles was set to 250,000. Testing was aborted in case of plate or screw failure. Axial load to failure was tested with a speed of 1 mm/s. Kruskal–Wallis and Dunn’s post hoc tests were used. Titanium, f-PEEK, and PEEK showed no failure in fatigue testing and PPSU (p < 0.001) failed against titanium, f-PEEK, PEEK, and PEKK. Titanium allowed the highest load to failure compared to f-PEEK (p = 0.049), PEEK (p = 0.008), PEKK (p < 0.001), and PPSU (p = 0.007). f-PEEK, PEEK, and PEKK withstood expected physiological bite force. Although titanium plates provided the highest fatigue strength, f-PEEK and PEEK plates showed no failure over 250,000 chewing cycles indicating sufficient mechanical strength for mandible reconstruction.
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Trajkovski, Ana, Nejc Novak, Jan Pustavrh, Mitjan Kalin, and Franc Majdič. "Performance of Polymer Composites Lubricated with Glycerol and Water as Green Lubricants." Applied Sciences 13, no. 13 (2023): 7413. http://dx.doi.org/10.3390/app13137413.

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The study analysed the tribological performance of five different polymer composites: polyetheretherketone reinforced with 30% carbon fibres—PEEK CF30, polyetheretherketone reinforced with 10% carbon fibres, 10% graphite and 10% polytetrafluoroethylene—PEEK MOD, polytetrafluoroethylene reinforced with 25% carbon fibres—PTFE CF25, polyoxymethylene with 30% carbon fibres—POM CF30 and ultra-high molecular weight polyethylene—UHMW PE. The polymers were tested under the sliding regime of a reciprocating stainless-steel ball on a polymer disc, with test parameters expected for hydraulic valves. Two environmentally safe lubricants were used: glycerol and water. The selected polymer materials and their tribological properties were compared based on the coefficient of friction and the specific wear rate. The worn surfaces were examined using scanning electron microscopy, and the transfer film was analysed using the energy dispersive spectroscopy technique. When tested in glycerol, a comparable and low coefficient of friction was measured for all polymers (~0.02). At the same time, a significantly lower coefficient was measured for all polymers in glycerol compared to water-lubricated conditions (~0.06–0.22). The polymers differed in the measured specific wear rate, which increases significantly in water for all polymers. A lower specific wear rate was measured for three polymers with higher microhardness: PEEK CF30, PEEK MOD and POM CF30. In water, PEEK CF30 showed superior tribological properties under harsh conditions but was well followed by POM CF30, which showed the most intense transfer film.
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Shetty, Sandeep, Nandish B. T., Vivek Amin, Pooja Harish, Stanly Selva Kumar, and Shahira. "Evaluation of 3D printed PEEK and other 3D printed biocompatible materials as healthcare devices." Biomedicine 42, no. 5 (2022): 956–60. http://dx.doi.org/10.51248/.v42i5.1959.

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Introduction and Aim: Additive manufacturing has sought a widespread attention and higher rate of development which can also be modeled by processing of the data acquired by medical Computer Tomography scan. The object is built on a built plate of the printer in layers to form a final required model. Thus, a patient-specific model can be created from imaging data set. Materials available for such printing are elastomers, polymers, metals, or ceramics. The polymer, Polyether ether ketone (PEEK) has been used in health care applications, such as medical devices, and implants due to its high strength, biocompatibility, and light weight. Stainless steel (316L) is commonly used due to its strength, bio-tolerance, corrosion resistance and its formability. The aim of this study was to compare the mechanical strength and biocompatibility of medical grade PEEK and stainless steel. Material and Methods: The test sample of PEEK was prepared using unreinforced PEEK (450G-Victrex Plc., Lancashire, UK) at the Prototyping Lab with a 3D-Printer - INTAMSYS - FUNMAT HT. Samples of stainless steel was printed using the iFusion SF1 Metal 3D Printer using Powder Bed Fusion (PBF) technology. The mechanical tests such as compressive, impact, and tensile tests were performed using an electromechanical universal testing machine (UTM) model- Zwick/Roell Z020 with a 20kN load cell. Biocompatibility tests were done using L929 cells to assess the cytotoxicity of the dental materials. Results: The tensile strength of PEEK polymer was 70+1.6 and the impact strength of PEEK polymer was 289 J/m. Conclusion: The tensile strength of stainless steel was higher compared to that of PEEK polymer, and the impact strength of PEEK polymer higher compared to stainless steel. Thus, it can be concluded that both biomaterial such as 316L stainless steel and PEEK are non-toxic to fibroblast.
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Chen, Ying, Ning Yang, Yi Zhang, and Lei Liu. "Isothermal Equation of State of Polyether Ether Ketone (PEEK) by Optical Imaging Method in Diamond Anvil Cell." Polymers 17, no. 5 (2025): 655. https://doi.org/10.3390/polym17050655.

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Polymers serve as important functional materials in various environments, including high-pressure conditions. However, the behavior of polymers under high pressure is currently less understood. In this study, the isothermal equation of state of polyether ether ketone (PEEK), an important polymer, was measured using the diamond anvil cell technique at up to 8 GPa. The isotropic compression behavior of PEEK samples was investigated by monitoring the area change in PEEK disks during the compression process using the optical imaging method. The present results shed light on the mechanical properties of PEEK under extreme conditions, which will guide the applications of PEEK at high pressures.
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Toma, Flavia Roxana, Lavinia Cristina Moleriu, and Liliana Porojan. "Micro-CT Marginal and Internal Fit Evaluation of CAD/CAM High-Performance Polymer Onlay Restorations." Polymers 15, no. 7 (2023): 1715. http://dx.doi.org/10.3390/polym15071715.

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(1) Background: The use of high-performance polymers for fixed restorations requires additional studies regarding their adaptability and processing with CAD/CAM technology. This in vitro study aims to assess the marginal and internal fit of PEEK and PEKK materials using microcomputed tomography. (2) Methods: Twenty-four (n = 8) MOD onlays made of PEKK (Pekkton ivory), unmodified PEEK (Juvora medical), and modified PEEK (BioHPP) were investigated. A typodont mandibular left first molar was scanned to achieve 24 resin, 3D printed abutment teeth. The onlays were fabricated with a five-axis milling machine, and after cementation of the specimens, the marginal (MG) and internal gaps (IG) were evaluated at twelve points in the mesio-distal section and thirteen points in the bucco-lingual section using microcomputed tomography. For statistical data analysis, Wilcoxon signed-rank/paired Student t-Test, Mann–Whitney/unpaired Student t-Test, and one-way ANOVA test were applied. (3) Results: Significant differences (p < 0.05; α = 0.05) were reported between the MG and IG for each material for all three polymers and also among two materials in terms of the MG and IG (except Juvora-BioHPP). The highest IG values were recorded in angular areas (axio-gingival line angle) in the mesio-distal section for all the polymers. (4) Conclusions: For all the materials, MG < IG. The type of polymer influenced the adaptability; the lowest marginal and internal gap mean values were recorded for BioHPP. The analyzed polymer used for onlays are clinically acceptable in terms of adaptability.
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LESIUK, Grzegorz, Aleksandra SAWICKA, José CORREIA, and Roman FRĄTCZAK. "FRACTURE RESISTANCE ANALYSIS OF PEEK-POLYMER." Engineering Structures and Technologies 9, no. 4 (2017): 207–13. http://dx.doi.org/10.3846/2029882x.2017.1417062.

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PEEK is a thermoplastic polymer with halfcrystallic structure – the scientific name of this material is poly(oxy- 1,4-phenylene-oxy-1,4-phenylenecarbonyl-1,4-phenylene). It has a high melt and glass transition temperatures (Tm = 340 oC, Tg = 143 oC), high chemical resistance and is melt processable. Thus it has been used in a variety of structural and insulation applications. Nowadays, one of them is the biomedical application. The mechanical properties of PEEK have been extensively investigated in many research papers. However, there is not so high number of papers devoted to the fracture susceptibility of PEEK-material. Therefore, the the aim of this work is to present the results of studies on PEEK material with the use of fracture toughness test and digital image correlation. In order to conduct the tests, there were used two types of samples: SENB and CT. In comparison with other polymeric materials subjected to biomedical application, PEEK material presents relatively good fracture resistance with their biocompatibility.
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Hasegawa, Shin, Kimio Yoshimura, Akihiro Hiroki, Yue Zhao, and Yasunari Maekawa. "Mechanically Tough Polymer Electrolyte Membranes Prepared By Radiation-Induced Graft Polymerization of Poly (ether ether ketone) Film." ECS Meeting Abstracts MA2024-02, no. 43 (2024): 2915. https://doi.org/10.1149/ma2024-02432915mtgabs.

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The development of state-of-the-art polymer electrolyte membranes is indispensable for solid polymer fuel cells. To make a desired membrane, we have reported the radiation-induced graft polymerization (RGP) method in our previous studies, which is a fascinating technique with great advantages of low-cost fabrication and imparting new functionality via graft polymers to commercially available substrate polymer films, whose excellent mechanical/thermal properties are maintained. Among various substrate polymers, poly (ether ether ketone) (PEEK) is regarded as the most promising aromatic hydrocarbon material for the long life-time operation requirement of fuel cells due to its excellent mechanical stability and high gas barrier property at high temperature. However, graft polymerization on PEEK substrate is rather difficult. To successfully obtain PEEK-based polymer electrolyte membranes with suitably-balanced properties, we have extensively investigated the graft polymerization and irradiation conditions. In this work, we will report the synthesis of both PEEK-based proton- and anion-exchange membranes (PEEK-PEMs and PEEK-AEMs, respectively), and the fuel cell performance using these two types of membranes. 1)RGP for making PEEK-PEMs and PEEK-AEMs. The PEEK base films used for RGP was previously immersed in (1, 4-dioxane) DOX at 50°C for 18 hours as a solvent annealing treatment. Ethyl styrene sulfonate (ETSS) and chloromethyl styrene (CMS) are used as precursors for PEMs and AEMs, respectively (Scheme 1). For the synthesis of PEEK-PEMs, the solvent-annealed PEEK films were pre-irradiated with 60Co ϒ-ray at room temperature in argon atmosphere with a total dose 160 kGy. Then the samples were immersed in ETSS/DOX solution (1/1 v/v) at 80°C under the argon atmosphere. The resultant grafted-PEEK membranes has a grafting degree (GD) of 150%. After hydrolysis treatment, the final PEEK-PEM shows an ion-exchange capacity (IEC) of 2.5 mmol/g and a proton conductivity of 0.1 S/cm at 25 °C. For the synthesis of PEEK-AEMs, the same irradiation and polymerization procedures as in the synthesis of PEEK-PEMs were performed, by using CMS as monomers instead of ETSS. The CMS-grafted PEEK with high GD of 66% was obtained in tetraethylenglycol as a solvent. The grafted PEEK was converted to AEM by treating in trimethylamine with a quaternization degree of 76%. The obtained AEM has an IEC of 1.7 mmol/g and an anion conductivity of 0.128 S/cm at 60°C. The mechanical strength and elongation of the resulting PEEK-PEM at 80°C and 100%RH were measured to be 22 MPa and 50%, respectively, which are superior to those of Nafion (10 MPa and 200%, respectively). PEEK-AEM also shows good mechanical strength and elongation of 94 MPa and 18%, respectively, at room temperature and 70% RH. 2)Fuel cell performance evaluation. Fuel cell test using PEEK-PEMs and AEMs was carried out according to previous reports [1]. The membrane was sandwiched by anode and cathode electrodes (Pt or Pt/Ru loading 0.5 mg/cm2) and hot-pressed, and then obtained membrane/electrodes assembly (MEA) was then set into a 5 cm2 fuel cell for testing. The cell was fed with pure hydrogen and oxygen gases at a flow rate of 0.05 L/min each to the anode and cathode, respectively, under atmosphere pressure. The cell condition was 80°C and 100%RH. Fuel cell test with an MEA incorporating 16 μm PEEK-PEM shows a good performance of an open circuit of 0.9 V and a power density of 860 mW/cm2 at a current density of 2240 mA/cm2 (Figure 1(a)). Using the PEEK-g-AEM membrane, it shows an open circuit voltage value of more than 0.9 V and a power density of 673 mW/cm2 at a current density of 1199 mA/cm2 (Figure 1(b)). As described above, utilizing radiation-induced graft polymerization, we have for the first time successfully developed two types of polymer electrolyte membranes, PEEK-PEM and PEEK-AEM, using the mechanically tough and chemically stable aromatic hydrocarbon polymer PEEK as the substrate. [1] J. Chen, et al. J.Membr. Sci. 2008, 319, 1-4. Figure 1
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Singh, Reeti, Ján Kondás, and Christian Bauer. "Connecting Polymers and Metals Using Cold Gas Spray." AM&P Technical Articles 176, no. 8 (2018): 38–40. http://dx.doi.org/10.31399/asm.amp.2018-08.p038.

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Abstract Coating development using cold gas spray technology demonstrates the feasibility of bonding polymers to metal substrates and metals to polymer composite substrates with good adhesion. The examples addressed are polyetheretherketone (PEEK) coatings on steel and aluminum substrates and metallic coatings on carbon fiber reinforced polymer (CFRP) composites.
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Kucher, Michael, Martin Dannemann, Niels Modler, Christian Hannig, and Marie-Theres Weber. "Effects of Endodontic Irrigants on Material and Surface Properties of Biocompatible Thermoplastics." Dentistry Journal 7, no. 1 (2019): 26. http://dx.doi.org/10.3390/dj7010026.

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Passive irrigation is an efficient method for a successful endodontic treatment. During sonic activation biocompatible polymer tips are used to activate irrigants. Compared to ultrasonic activation with metallic tips, polymer tips have the advantage of a reduced risk of fracture and minimise dentine damage. Hence, two polymers, polyether ether ketones (PEEK) and polyamide (PA6), were identified for the manufacturing of novel irrigation tips. The chemical resistance against the irrigants ethylenediaminetetraacetic acid (EDTA) 20%, chlorhexidine gluconate (CHX) 2% and sodium hypochlorite (NaOCl) 5.25% was analysed. Using microindentation, the change of hardness, elasticity, surface roughness and appearance of the polymers was determined. PA6 had a high absorption of irrigant compared to PEEK. PEEK was resistant to the investigated irrigants and showed no significant alteration of surface and mechanical properties, whereas PA6 slightly increased its hardness, elastic modulus and surface roughness during long-term exposure at 37 °C. However, PA6 tips seem to be a promising disposable product due to the material’s high deformability and low manufacturing costs. Particularly with regard to structural-dynamic properties and high chemical resistance, PEEK can be considered as a material for reusable irrigation tips.
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Dissertations / Theses on the topic "PEEK polymer"

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Ewing, Zachary. "Synthesis and characterization of PEEK analogues utilizing 3,5- and 2,4-difluorobenzophenone." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1484314722085434.

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Al, Raheil I. A. M. "Development of crystalline morphology in polyethylene and PEEK." Thesis, University of Reading, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378160.

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Shi, Ying. "High Temperature Shape Memory Polymers & Ionomer Modified Asphalts." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1374793580.

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Waddon, Alan J. "The crystallisation and morphology of poly(ether-ether-ketone) (PEEK), poly(ether-ketone) (PEK) and poly(phenylene-sulphide) (PPS)." Thesis, University of Bristol, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328229.

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Wang, Nannan. "Carbon-coated nanoparticles and their application in high performance polymer nanocomposites." Thesis, University of Exeter, 2018. http://hdl.handle.net/10871/33110.

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Shrinking down into nanoscale, materials exhibit huge property advantages over their bulk form. New forms of carbon at nanoscale have occupied the prominent position in modern materials research. With a very long history accompanying our human civilisation, carbon as a wonder material has once again contributed to our technological advances, as evidenced by the discoveries and research attractions in the last a few decades. Research into fullerenes (C60, C70, etc.), carbon nanotubes (CNTs) and graphene has been continued raising, because of the numerous novel properties associated with these new carbon forms1-3. On top of their excellent electronical, physical and chemical properties, CNTs and graphene also exhibit excellent mechanical properties including ultra-high tensile strength, Young’s Modulus, as well as high thermal conductivities. Research into carbon has also promoted the flourish of many new non-carbon nanomaterials, and typical examples include the inorganic fullerene-like tungsten disulphide (IF-WS2) nanoparticles (NPs), numerous oxide NPs and nanowires that also exhibit various remarkable properties, such as high hardness and anti-oxidation stability. To combine the outstanding performances of both carbon and non-carbon nanomaterials by marrying nanoscale carbon with various metal oxide particles, which forms the backbone of my thesis by carrying out the intensive investigations. In my project it have further validated the advantages of the resulting new carbon-coated NPs in different polymeric matrix composites. The main findings are as follows: 1. A home-made rotary chemical vapour deposit (RCVD) system has been modified and this versatile facility has been applied successfully to produce different types of graphitic carbon-coated nanocomposite particles, from micro- down to nano-scale, including IF-WS2, TiO2, ZnO, Y2O3, Cr2O3, CeO2 and ZrO2 etc. The production can be up to 30 g/per batch, which is 10s times more than using a traditional static furnace, by avoiding severe agglomeration. 2. The resulting coating consists of a few layered graphitic carbon with lattice space 0.34 nm. The thickness of the coating is simply controllable between 1-5 nm, depending on the deposition time (10~60 min), precursor injection flow rate (1.2~2.4 ml/L) and heating temperature (700~900 oC). Furthermore, the oxide core of ZnO@C was removed by heating under the H2/Ar atmosphere, and have successfully generated nano- to micro-scale, hollow, closed, and all-carbon structures. 3. The commercial Nylon 12 is applied to fabricate the metal oxide polymer composite. Using ZnO@C-Nylon 12 composite as an example, at 2 wt% content, the composites have achieved with the ultimate tensile strength increased by 27% (from 47.9 to 59.6 MPa), In particular, at 4 wt% content, the ZnO@C showed an impressive improvement in thermal conductivity of nearly 50% (From 0.21 t0 0.31 W∙m-1∙K-1), comparing 16% improvement for ZnO-Nylon 12 composite. 4. Apart from investigations of nylon composite, intensive studies of the Poly ether ether ketone (PEEK), an important high performance engineering thermoplastics polymer, and its nanocomposites reinforced by IF-WS2 and IF-WS2@C have been carried out in this thesis. The IF-WS2/PEEK composites exhibited not only an improvements of 24% (From 77.6 to 96.7 MPa) in the tensile strength (2 wt%), but also showed an extraordinary increase in thermal conductivity by 190%, from 0.248 to 0.719 W∙m-1∙K-1 at 8 wt%, higher onset decomposing temperatures (54 oC) against the plain PEEK. 5. Moreover, owing to the better dispersal capacity of IF-WS2@C NPs, the ternary IF-WS2@C-PEEK nanocomposites produced in this thesis displayed impressive mechanical properties, increased by 51% (From 77.6 to 120.9 MPa, at 2 wt%), and extremely greater thermal conductivity, with 235% (From 0.248 to 0.831 W∙m-1∙K-1 at 8 wt%), and better stability than the comparison IF-WS2-PEEK composites. The parameters influencing the coating quality and thickness have also been investigated. Further, their interface studies based on the FTIR and XPS techniques have verified the formation of chemical bonding (C=S bonding and carbon π-π bonding), rather than physically bonded together. The successful application of the generic RCVD process can be further extended to the processing of many new particles for an ultrathin carbon coating. Considering the vast amount of literature focusing on carbon, the project further processing of carbon-coated materials in composites could easily be tailored to achieve desired surface contacts with different matrices and leading to the better desired performance, as verified in this thesis for the advanced binary and ternary composites. Finally, this research is expecting to expand the application potentials of PEEK-based nanocomposites in critical areas where thermal conductivity and thermal stability are important.
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Robinson, Leanne. "Strategies to enhance the bioactive nature of peek polymer surfaces using calcium phosphate coatings." Thesis, Ulster University, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.714495.

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This research investigated the potential to deliver substituted CaP thin films onto medically relevant substrates, in a one step process, via RFMS, so as to enhance the substrates surface topography and chemistry to stimulate an enhanced osteoblastic response. RFMS was utilised initially to sputter deposit (substituted-Sr and/ Zn) CaP onto Ti. Chemical and topographical surface properties in both the as-deposited and annealed state at 500 °C were investigated. Studies were undertaken which placed special emphasis on how the chemistry and morphology of (substituted) CaP coatings, sputter deposited onto PEEK, altered in relation to the deposition parameters. It was realised that a gradient interlayer was created between the PEEK substrate and the (substituted) CaP coating due to the calcium, phosphate and substituted ions being implanted within the PEEK to different depths in an erosion/ deposition process and that all of the coatings produced were amorphous, this created chemical and morphological changes to the PEEK substrate, but no damage to the bulk material. With the addition of impurity ion(s) the thin film formation took longer indicating a slower development rate. The chemical and morphological stability of the various (substituted) CaP coatings deposited onto PEEK were studied under physiological conditions, each coating had the ability to withstand this environment for 14 days. The in vitro response to the neat PEEK and (substituted) CaP surfaces was investigated up to 21 days, with all sample types proving their capability in supporting early cell attachment and proliferation. ALP measurements indicated high levels of initial differential potential on the Sr substituted CaP modified PEEK and the crystalline (substituted) CaP modified Si. By day 14 the (substituted) CaP modified PEEK samples maintained the highest levels of osteogenic differentiation. The Sr substituted CaP modified PEEK substrates promoted earlier and prolonged differentiation potential when compared to the CaP coated PEEK.
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Golzar, Mohammad. "Melt Spinning of the Fine PEEK Filaments." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1101380771578-37580.

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The production of fine filaments using the melt spinning process needs considerable effort. A thermoplastic melt is stretched from the spinneret under a constant take-up speed. The high performance thermoplastic PEEK is solidified in the melt spinning process in a small distance and short time. Therefore, the fine PEEK filaments in the fibre formation zone underwent a high deformation and cooling rate. To make the melt spinning process stable and to produce the fine PEEK filaments, material properties and material behaviour are examined using on-line and off-line measurements. The fibre speed measured using Laser Doppler Anemometry and simultaneous temperature measured using infrared thermography enable both the strain rate and consequently the apparent extensional viscosity to be estimated. This provides the apparent extensional viscosity over the spinning line, which can itself show the structural development of PEEK fibres in the fibre formation zone, i.e. necking and solidification phenomena. The one-dimensional fibre formation model must include both procedural and material parameters. The heat transfer coefficient was estimated using the filament temperature measurement and showed a relatively high contribution of radiation and free convection in comparison to forced convection near the spinneret. The improved model of PEEK fibre formation gave a good agreement to both temperature and speed measurements, and also confirmed the high deformation rate effect on the extensional viscosity, which could be simulated with a properly generalised Newtonian constitutive equation. The end properties of the fibres, such as as-spun filament fineness, orientation (expressed using total birefringence) and total crystallisation (examined using DSC) are investigated in relation to different spinning conditions, i.e. take-up speed, throughput and the draw down ratio. The tensile test diagram results, measuring phenomena such as the elongation at break, tenacity, and the Young modulus of elasticity are also analysed in order to complete the correlation of the above-mentioned spinning conditions to the structural properties of as-spun fine PEEK filaments. The melt spinning of fine PEEK fibres under different spinning conditions is examined with the purpose of finding the optimum take-up speed and throughputs. Other spinning conditions, such as the temperature of melt processing, and the arrangement and diameter of the spinneret holes, are changed in order to make the process more stable. The recommendations for further study can be used to further examine some aspects of this work; however, this work presents a new concept for fine PEEK melt spinning supported by spinnability examinations under different spinning conditions and the improved model of fibre formation, which is also relevant for typical industrial processing applications.
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Delhorbe, Virginie. "Elaboration de membranes pour piles à combustible à architecture réseaux (semi-)interpénétrés de polymères." Thesis, Cergy-Pontoise, 2011. http://www.theses.fr/2011CERG0512/document.

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Les membranes polymères utilisées actuellement dans les piles à combustible voient leurs performances diminuer à haute température (T &gt; 90°C) et à faible humidité relative (HR &lt; 50%) [1]. Cette diminution est principalement liée aux pertes des propriétés mécaniques et de conduction dans ces conditions. Afin de remédier à ces inconvénients, des membranes originales présentant une architecture de réseaux (semi-)interpénétrés de polymères [2] ((semi-)RIP) dans lesquelles un réseau hydrophobe est associé à un réseau hydrophile, ont été développées dans le cadre du projet ANR PAN-H « AMEIRICC ».Ces membranes sont constituées d'un réseau fluoré assurant la tenue mécanique et d'un réseau polyélectrolyte sulfoné assurant la conduction protonique du matériau, chacun des réseaux étant issu de différents précurseurs fournis par l'IAM et le LMOPS. Après la réaction de polymérisation/réticulation des deux réseaux, les matériaux sont caractérisés afin de réaliser un retour rapide sur leur synthèse et d'optimiser cette dernière pour parvenir à un matériau présentant les principales propriétés recherchées (conductivité protonique, stabilité thermique et chimique, principalement). Une fois la synthèse optimisée, des premiers matériaux ont été fournis au LMPB, au SPrAM et au LITEN pour la validation des membranes sélectionnées. Les propriétés structurales et les valeurs de conductivité des matériaux ont permis de conclure que les (semi-)RIP présentent une morphologie similaire à celle décrite pour le Nafion dans laquelle la phase fluorée et la phase conductrice ionique sont co-continues. Plusieurs séries de ces membranes ont ensuite été réalisées en modifiant la composition chimique afin d'étudier la variation des propriétés des matériaux obtenus. Enfin, les premiers tests en pile à combustible de ces membranes originales se sont révélés prometteurs.[1] R. Borup, J. Meyers, B. Pivovar, Chem. Rev. 107 (2007) 3904.[2] L. H. Sperling and V. Mishra. The current status of interpenetrating polymer networks. In: Kim SC, Sperling LH, editors. IPNs around the world: science and engineering. New York: Wiley; 1997: p. 1-25<br>The polymer membranes currently used in fuel cells are reducing their performance at high temperature (T &gt; 90°C) and low relative humidity (RH &lt; 50%) [1]. This decrease is mainly due to loss of mechanical properties and conduction in these conditions. To overcome these drawbacks, unique membranes having an architecture (semi-) interpenetrating polymer network [2] ((semi-) IPN) in which a hydrophobic network is associated with a hydrophilic network, were developed under PAN-H “AMEIRICC” ANR Project.These membranes consist of fluorinated network ensuring the mechanical and sulfonated polyelectrolyte network ensuring the proton conduction of material, each network being derived from different precursors provided by IAM and LMOPS. After the polymerization/cross linking reaction of the two systems, materials are characterized to carry out a rapid return on their synthesis and optimize it to achieve a material with the main properties (proton conductivity, thermal and chemical stability, primarily). Once the synthesis is optimized, the first materials were provided to LMPB, SPrAM and LITEN for validation of selected membranes.The structural properties and conductivity values of materials led to the conclusion that (semi-) IPN have a similar morphology to that described for the Nafion in which the fluorous phase and the ionic conducting phase are co-continuous.Then several series of these membranes were conducted by changing the chemical composition in order to study the variation of obtained material properties. Finally, the first fuel cell test of original membranes have shown promise.[1] R. Borup, J. Meyers, B. Pivovar, Chem. Rev. 107 (2007) 3904.[2] L. H. Sperling and V. Mishra. The current status of interpenetrating polymer networks. In: Kim SC, Sperling LH, editors. IPNs around the world: science and engineering. New York: Wiley; 1997: p. 1-25
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Rivière, Lisa. "Analyse des mécanismes de conduction thermique dans les composites structuraux PEEK/particules submicroniques d'argent." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30200/document.

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Ce travail s'inscrit dans la problématique de l'optimisation des transferts thermiques et électriques dans les composites à matrice polymère. Il a été démontré que l'introduction de particules conductrices dans une matrice isolante permet d'en augmenter la conductivité thermique. À l'échelle macroscopique, les mécanismes résistifs sont influencés par un jeu complexe de paramètres : nature des constituants, morphologie de la phase dispersée et interactions entre matrice et particules. L'influence de ces différents paramètres sur les propriétés thermiques de composites PEEK/particules d'argent submicroniques a été analysée. Les données expérimentales ont été comparées à des modèles afin d'interpréter l'origine structurale de l'évolution de la conductivité thermique observée. L'approche complète des mécanismes de conduction thermique implique l'analyse des composantes capacitive et diffusive. La capacité calorifique, la diffusivité thermique et la conductivité thermique sont liées aux échelles microscopiques et macroscopiques. Ces propriétés ont été étudiées en fonction du taux de particules et de la température<br>This work deals with the optimization of thermal transport mechanisms in polymer-based composites. It has been demonstrated that the introduction of conductive particles in a polymer matrix contributes to thermal conductivity enhancement. At macroscopic scale, resistive mechanisms are ruled by a complex set of parameters: constituents' nature, dispersed phase morphology and matrix/particles interactions. The influence of these parameters on PEEK/silver submicron particles composites has been studied. Experimental data have been compared to models to analyse the structural origin of thermal conductivity evolution. A global approach to study heat transport mechanisms imply the multiscale understanding of capacitive and diffusive contributions. Heat capacity, thermal diffusivity and thermal conductivity have been studied as a function of particles content and temperature
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Brunello, Giuseppe. "Computational modeling of materials in polymer electrolyte membrane fuel cells." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/48937.

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Fuel cells have the potential to change the energy paradigm by allowing more efficient use of energy. In particular, Polymer Electrolyte Membrane Fuel Cells (PEMFC) are interesting because they are low temperature devices. However, there are still numerous challenges limiting their widespread use including operating temperature, types of permissible fuels and optimal use of expensive catalysts. The first two problems are related mainly to the ionomer electrolyte, which largely determines the operating temperature and fuel type. While new ionomer membranes have been proposed to address some of these issues, there is still a lack of fundamental knowledge to guide ionomer design for PEMFC. This work is a computational study of the effect of temperature and water content on sulfonated poly(ether ether ketone) and the effect of acidity on sulfonated polystyrene to better understand how ionomer material properties differ. In particular we found that increased water content preferentially solvates the sulfonate groups and improves water and hydronium transport. However, we found that increasing an ionomer’s acid strength causes similar effects to increasing the water content. Finally, we used Density Functional Theory (DFT) to study platinum nano-clusters as used in PEMFCs. We developed a model using the atom’s coordination number to quickly compute the energy of a cluster and therefore predict which platinum atoms are most loosely held. Our model correctly predicted the energy of various clusters compared to DFT. Also, we studied the interaction between the various moieties of the electrolyte including the catalyst particle and developed a force field. The coordination model can be used in a molecular dynamics simulation of the three phase region of a PEMFC to generate unbiased initial clusters. The force field developed can be used to describe the interaction between this generated cluster and the electrolyte.
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Books on the topic "PEEK polymer"

1

Advanced Polymer Processing International Forum (2010 Qingdao, China). Advanced polymer science and engineeing: Selected, peer reviewed papers from the Advanced Polymer Processing International Forum, October 21-23, 2010, China. Trans Tech Publications, 2011.

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China) International Congress on Polymers in Concrete (14th 2013 Shanghai. Progress in polymers in concrete: Selected, peer reviewed papers from the 14th International Congress on Polymers in Concrete (ICPIC 2013), April 17-20, 2013, Shanghai, China. TTP, 2013.

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China) International Symposium on Polymer Composites and Polymer Testing (1st 2012 Hangzhou. Polymer Composites and Polymer Testing: Selected, peer reviewed papers from the 2012 International Symposium on Polymer Composites and Polymer Testing (ISPCPT 2012), March 23-25, 2012, Hangzhou, Zhejiang, China. Trans Tech Publications, 2012.

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Sun, Jianan. Peel test for the study of the fibre polymer interface. National Library of Canada, 2001.

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N, Hammoud A., and United States. National Aeronautics and Space Administration., eds. High temperature dielectric properties of Apical, Kapton, Peek, Teflon AF, and Upilex polymers. National Aeronautics and Space Administration, 1992.

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Alimuddin, Muhammad Asif. Peel test for the evaluation of environmental effects on fiber-polymer interface. National Library of Canada, 1998.

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Advanced Polymer Processing International Forum (2009 Qingdao, China). Advanced polymer processing: Selected, peer reviewd papers from the Advanced Polymer Processing International Forum, Qingdao, China, 19-21 August 2009, APPF2009. Trans Tech, 2010.

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China) Asian Workshop on Polymer Processing (2011 Qingdao Shi. Progress in polymer processing: Selected, peer reviewed papers from the Asian Workshop on Polymer Processing 2011 (AWPP2011), November 4-7, 2011, Qingdao, China. Trans Tech Publications Ltd, 2012.

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International Conference on "Smart Materials, Structures, and Systems" (4th : 2012 : Terme, Italy), ed. Electroactive polymers: Advances in materials and devices : selected, peer reviewed papers from the Symposium C "Electroactive Polymers: Advances in Materials and Devices" of CIMTEC 2012 - 4th International Conference "Smart Materials, Structures and Systems", held in Montecatini Terme, Italy, June 10-14, 2012. Trans Tech, 2013.

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Strain rate dependent modeling of polymer matrix composites. National Aeronautics and Space Administration, Glenn Research Center, 1999.

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Book chapters on the topic "PEEK polymer"

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Steiner, G., and C. Zimmerer. "Poly(aryl ether ether ketone) (PEEK)." In Polymer Solids and Polymer Melts – Definitions and Physical Properties I. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-32072-9_88.

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Panin, Sergey V., Lyudmila A. Kornienko, Nguyen Duc Anh, Vladislav O. Alexenko, Dmitry G. Buslovich, and Svetlana A. Bochkareva. "Three-Component Wear-Resistant PEEK-Based Composites Filled with PTFE and MoS2: Composition Optimization, Structure Homogenization, and Self-lubricating Effect." In Springer Tracts in Mechanical Engineering. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_13.

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AbstractThe aim of this work was to design and optimize compositions of three-component composites based on polyetheretherketone (PEEK) with enhanced tribological and mechanical properties. Initially, two-component PEEK-based composites loaded with molybdenum disulfide (MoS2) and polytetrafluoroethylene (PTFE) were investigated. It was shown that an increase in dry friction mode tribological characteristics in metal-polymer and ceramic-polymer tribological contacts was attained by loading with lubricant fluoroplastic particles. In addition, molybdenum disulfide homogenized permolecular structure and improved matrix strength properties. After that, a methodology for identifying composition of multicomponent PEEK-based composites having prescribed properties which based on a limited amount of experimental data was proposed and implemented. It was shown that wear rate of the “PEEK + 10% PTFE + 0.5% MoS2” composite decreased by 39 times when tested on the metal counterpart, and 15 times on the ceramic one compared with neat PEEK. However, in absolute terms, wear rate of the three-component composite on the metal counterpart was 1.5 times higher than on the ceramic one. A three-fold increase in wear resistance during friction on both the metal and ceramic counterparts was achieved for the “PEEK + 10% PTFE + 0.5% MoS2” three-component composite compared with the “PEEK + 10% PTFE”. Simultaneous loading with two types of fillers slightly deteriorated the polymer composite structure compared with neat PEEK. However, wear rate was many times reduced due to facilitation of transfer film formation. For this reason, there was no microabrasive wear on both metal and ceramic counterpart surfaces.
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Nicolais, L., A. Apicella, M. A. Del Nobile, and G. Mensitieri. "Solvent Sorption Synergy in Peek." In Durability of Polymer Based Composite Systems for Structural Applications. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3856-7_6.

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Wohlfarth, Ch. "Second virial coefficient of poly(oxy-1,4-phenyleneoxy-1,4-phenylenecarbonyl-1,4-phenylene) (PEEK)." In Polymer Solutions. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-02890-8_647.

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Wohlfarth, Ch. "Second virial coefficient of poly[oxy(methyl-1,4-phenylene)oxy-1,4-phenylenecarbonyl-1,4-phenylene] (PEEK-Me)." In Polymer Solutions. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-02890-8_645.

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Buchman, A., H. Dodiuk, M. Rotel, and J. Zahavi. "Durability of laser treated reinforced PEEK/epoxy bonded joints." In Polymer Surfaces and Interfaces: Characterization, Modification and Application. CRC Press, 2023. http://dx.doi.org/10.1201/9780429070297-5.

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Young, R. J., R. J. Day, M. Zakikhani, and I. M. Robinson. "Fibre Deformation and Residual Thermal Stresses in Carbon Fibre Reinforced Peek." In Integration of Fundamental Polymer Science and Technology—3. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1115-4_27.

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Venkatesh, N., and P. K. Dinesh Kumar. "Comparative Study on the Mechanical Performance of Solid Lubricants Over Peek Polymer." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4488-0_67.

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Goodwin, A. A., J. N. Hay, G. A. C. Mouledous, and F. Biddlestone. "A Compatible Blend of Poly(Ether Ether Ketonex)(Peek) and Poly(Ether Imide)(Ultem 1000)." In Integration of Fundamental Polymer Science and Technology—5. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3890-1_5.

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Bilgen, Merve Bagci, and Alaeddin Burak Irez. "Development of PEEK Matrix Polymer Composite and Additive Manufacturing by Pellet Extrusion Method." In Challenges in Mechanics of Biological Systems and Materials, Thermomechanics and Infrared Imaging, Time Dependent Materials and Residual Stress, Volume 2. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-50470-9_1.

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Conference papers on the topic "PEEK polymer"

1

Advincula, Rigoberto C. "3D Printing High Performance Polymers and the Oil and Gas Industry." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-13505.

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Abstract Additive manufacturing and 3D printing hold a number of promise in bringing on-demand and high-performance parts production capable of adding high value to the oil and gas industry. Non-metallic parts offer a number of advantages in reducing corrosion issues and enabling properties such as high-temperature resistance or reversibly, dissolvable or degradable properties. However, most parts used for completion and down-hole tools are still based on traditional molding, extrusion, thermoforming, etc. methods. 3D printing methods (FDM, SLA, SLA, VSP, etc.) holds promise in fabricating parts ranging from high-performance polymer materials (PEEK, PPS, Ultem, etc.) to elastomeric (thermoset elastomer and thermoplastic elastomer) materials. The use of polymer nanocomposite polymers is also a possibility. This talk will give an overview of 3D printing polymer materials from high-performance polymers, elastomers, and nanocomposite materials with high potential for the industry and current projects in the Advincula Research group. This will also enumerate their testing for thermo-mechanical properties including possible new protocols for evaluating performance for downhole conditions, environmental exposure, and degradation properties.
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Kadin, Yuri, Gerrit Jan Dop, Richard Schaake, Gijs de Kort, and Marcus Boehm. "Modeling of Fatigue/Creep in Polymer Cage of Large Size Bearing." In The 12th International Conference on Fracture Fatigue and Wear. Trans Tech Publications Ltd, 2025. https://doi.org/10.4028/p-lmja4i.

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A single pocket cage is the SKF product, which is used in Large Size Bearings for wind industry. The function of a bearing cage is to hold, guide and separate rolling elements, and differently from the conventional cage, the current one consists of segments, which eases the bearing assembly and reduces its weight. The long life challenge (25 years!) requires considering fatigue, and since the single pocket cage is made of PEEK polymer, it is also susceptible to creep (in near room temperature), which enhances fatigue damage. The current work proposes the numerical model capturing non-linear viscoelasticity of PEEK. The mechanical behavior of this material is identified in uniaxial tension test and is modeled in Finite Elements (FE) by means of the Parallel Rheological Framework (this numerical tool has been recently implemented in the commercial software ABAQUS). The current FE model enables to apply cyclic loading, simulating the material response of cage when it operates in running bearing. By applying sub-modeling technique only a small domain is modeled which improves the computational time efficiency. The sub-model domain corresponds to the cage region, where the stress is high resulting to the material yielding, fatigue/creep degradation (due to inelastic cyclic deformation) and initiation of fatigue crack. The FE results were combined with the test data, in attempt to relate the numerically predicted damage to the cage life. The development of irreversible deformation during cyclic loading, shakedown analysis and the stress volume effect, are the main focuses of the current work.
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Singh, Nand Kishore, Nicholas Beau Mennie, Isaac Nault, Behrad Koohbor, Francis M. Haas, and Ratneshwar Jha. "Analyzing Cold Spray of Polymer-Coated Metal Particles on Polymeric and Composite Substrates." In ITSC 2023. ASM International, 2023. http://dx.doi.org/10.31399/asm.cp.itsc2023p0222.

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Abstract Metallization of polymers and fiber-reinforced polymer composites is gaining attention due to the widespread application of these components in various industries, such as wind energy, aerospace, and automotive industries. Cold spray is a promising new technique to achieve the metallization of polymer and fiber-reinforced polymer composites. This work investigates the deposition mechanisms of polymer-coated metallic particles on polymer-based substrates by finite element analyses. Impact mechanics of PEEK-coated nickel particles impacting PEEK and carbon fiber-reinforced PEEK substrates are modeled. Results show the prominence of mechanical interlocking of metallic particles in the substrate, which occurs due to their entrapment inside the substrate, caused by the high energy impact-induced welding of scraped PEEK coating. The PEEK coating acts as a cushioning component, effectively mitigating the impact energy of the metallic component. The scraped PEEK coating also accumulates on the upper half of the particle, forming a cap welded to the substrate and sealing the metallic particle inside. It is observed that the depth of the carbon fiber mat in the substrate affects the mechanism and the success of deposition.
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Che, H., P. Vo, and S. Yue. "Metallization of Various Polymers by Cold Spray." In ITSC2017, edited by A. Agarwal, G. Bolelli, A. Concustell, et al. DVS Media GmbH, 2017. http://dx.doi.org/10.31399/asm.cp.itsc2017p0098.

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Abstract Previous results at McGill University have shown that metallic coatings can be successfully cold sprayed onto polymeric substrates. This paper studies the cold sprayability of various metal powders on different polymeric substrates. Five different substrates were used, including carbon fibre reinforced polymer (CFRP), acrylonitrile butadiene styrene (ABS), polyether ether ketone (PEEK), polyethylenimine (PEI); mild steel was also used as a bench mark substrate. The CFRP used in this work has a thermosetting matrix, and the ABS, PEEK, and PEI are all thermoplastic polymers, with different glass transition temperatures as well as a number of distinct mechanical properties. Three metal powders, tin, copper and iron, were cold sprayed with both a low-pressure system and a high-pressure system at various conditions. In general, cold spray on the thermoplastic polymers rendered more positive results than the thermosetting polymers, due to the local thermal softening mechanism in the thermoplastics. Thick copper coatings were successfully deposited on PEEK and PEI.
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Palumbo, Joshua, Ramgopal Varma Ramaraju, Sanjeev Chandra Matthew S. Schwenger, Madison S. Kaminskyj, Francis M. Haas, and Joseph F. Stanzione III. "Mixed-Material Feedstocks for Cold Spray Additive Manufacturing of Metal-Polymer Composites." In ITSC 2023. ASM International, 2023. http://dx.doi.org/10.31399/asm.cp.itsc2023p0186.

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Abstract High-performance polymers such as poly(ether ether ketone) (PEEK) are appealing for a wide variety of industrial and medical applications due to their excellent mechanical properties. However, these applications are often limited by relatively low thermal stability and conductivity compared to metals. Many methods developed to metallize polymers, including vapor deposition and thermal spray processes, can lead to poor quality control, low deposition rate, and high cost. Thus, cold spray is a promising potential alternative to rapidly and inexpensively produce polymer-metal composites. In this study, we investigated the deposition characteristics of metalpolymer composite feedstock, composed of PEEK powder with varying volume fractions of copper (Cu) flake added, onto a PEEK substrate. We prepared the Cu-PEEK composite powder in varying compositions by two methods: hand-mixing the powders and cryogenically milling the powders. Scanning electron microscopy (SEM) of the feed mixtures shows that cryogenically milling the polymer and metal powders together created uniformly distributed micron-scale domains of Cu on PEEK particle surfaces, and vice versa, as well as consolidating much of the porous Cu flake. In lowpressure cold spray, the relatively large volume fractions of PEEK in the composite mixtures allowed for lower operating temperatures than those commonly used in PEEK metallization (300-500 °C). While the deposition efficiencies of each mixture were relatively similar in single-layer experiments, deposits formed after multiple passes showed significant changes in deposition efficiency and composition in PEEK-rich feedstock mixtures. SEM of deposit surfaces and cross-sections revealed multiple co-dominant mechanisms of deposition, which affect both the porosity and final composition of the deposit. Though present in all samples analyzed, the effects of cryogenic milling were more prevalent at lower Cu concentrations.
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Liao, H., E. Beche, C. Coddet, and F. Berger. "On the Microstructures of Thermally Sprayed “Peek” Polymer." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p0025.

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Abstract Polymer coatings find increasing interest for anticorrosion applications and others. Thanks to its extraordinary properties (high chemical stability, low creep rate and good electrical resistivity at relatively high temperature) PEEK (Polyetheretherketone) polymer is now considered as a challenging matierial. In this work, PEEK polymer powder was thermally sprayed with different processes. Particle impacts were observed and coating was analyzed by infrared spectrometry. The temperature of the substrate was shown to play an important role in the formation of dense and continuous coatings. Thermal degradation during spraying produces new carbonyl species due to chain scissions; but the amount of decomposition could be controlled from the choice of spraying conditions.
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Cafiero, Livia, Olinda Alfano, Michele Iannone, Floriana Esposito, Salvatore Iannace, and Luigi Sorrentino. "Microcellular foams from PEEK/PEI miscible blends." In PROCEEDINGS OF THE REGIONAL CONFERENCE GRAZ 2015 – POLYMER PROCESSING SOCIETY PPS: Conference Papers. Author(s), 2016. http://dx.doi.org/10.1063/1.4965568.

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Burris, David L., and W. Gregory Sawyer. "Tribological Investigation of a Low Friction, Low Wear Polymer/Polymer Composite." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63524.

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Wear resistant and low friction solid lubricants offer the design engineer attractive options for extreme environment lubrication, particularly in situations where the use of fluid lubricants are precluded. Past work with wear resistant PTFE nanocomposites made with sub 100nm particles of alumina showed that the nanoparticles decorate the PTFE surface during jet-milling process. Subsequent compression molding of these powders is believed to result in a compartmentalize PTFE composite. It is hypothesized that these reinforcing nanoparticles arrest crack propagation, although there is qualitative evidence that they weaken strength of the composite. The hypothesis for this investigation was to use small particles of PEEK as the filler, which can act to compartmentalize damage and form a structural filler network that would not require matrix/filler strength for mechanical integrity. The tribological properties of composite samples ranging from 0–100 weight percent PEEK filled PTFE were evaluated in this study.
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Carrola, Mia, Amir Asadi, Ahmad Amiri, Zhenning Yu, and Hilmar Koerner. "ENABLING POLY ETHER ETHER KETONE AS A SOLID POLYMER ELECTROLYTE FOR STRUCTURAL BATTERY COMPOSITES." In SAMPE 2025 Indianapolis. Society for the Advancement of Material and Process Engineering, 2025. https://doi.org/10.33599/nasampe/s.25.0168.

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To advance the state of structural battery composites, more mechanically robust polymeric materials must be investigated for use as the ionically conductive electrolyte. Currently, the matrices being utilized in solid polymer electrolytes lack mechanical strength, and are often gels, due to their amorphous structure offering increased lithium-ion conductivity. To address the need for more robust, semicrystalline polymer matrices, poly ether ether ketone (PEEK) was selected as a candidate that would offer both ionic conductivity and mechanical reinforcement in these novel multifunctional composite structures. Through a series of functionalization procedures, specifically sulfonation and lithiation of the polymer chains, the PEEK exhibits ionic conductivity and an amorphous microstructure. However, to maintain the structural characteristics required of the matrix, careful functionalization is used to tailor the PEEK electrolytes and strike a balance between the two inversely related properties (ion conductivity and crystallinity). It was found that selective adjusting of the morphology of the solid electrolyte successfully enables the two properties that are most important for this multifunctional application. The discoveries presented from this work provide a foundation to continue progress on thermoplastic structural battery composites.
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Abubakar, Abba Abdulhamid, Abul Fazal M. Arif, Khaled S. Al-Athel, Syed Sohail Akhtar, Nestor Ankah, and Ahmad A. Sorour. "Optimizing Cold Spraying Parameters of Metallic Coatings Deposited Onto Polymer Substrate." In ASME 2024 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2024. https://doi.org/10.1115/imece2024-145682.

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Abstract Polymer-based composites offer several advantages, such as high strength-to-weight ratio, exceptional corrosion resistance, and tailored mechanical properties. However, they may also have limitations, such as poor surface finish, low thermal conductivity, and limited wear resistance especially when fabricated through 3D printing technologies. Therefore, through surface metallization, cold spray can overcome these limitations by depositing metallic composite coatings onto polymer-based components. This study investigates the optimization of cold spraying parameters to achieve effective polymer metallization via cold spraying of anti-bacterial coating onto PEEK. A combination of Cu and Al2O3 particles is used in the feedstock to effectively metallize PEEK. The cold spray parameters (such as gas temperature, particle velocity, powder feed rate, scan speed, step size, spray path pattern, and spray distance) are optimized to achieve high-quality metallic coatings using computational fluid dynamics (CFD) simulations that investigate particle flow dynamics. Finite element and smooth particle hydrodynamics simulations are used in a hybrid computational technique to evaluate the impact characteristics of the deposited particles. The optimized parameters are used to make coating samples and evaluate their microstructure, phase composition, and mechanical properties using various analytical tools. A gas pressure of 6 bar and a temperature of 400 °C were identified as optimized conditions for metallizing PEEK. Dendritic Cu particles resulted in shallower penetration depth and less PEEK erosion compared to spherical Cu particles. A dense and defect-free Cu-Al2O3 coating layer with a thickness of ∼ 290 μm. The presence of Al2O3 particles enhanced interfacial bonding and hardness of the coating layer. The results demonstrate ways of achieving effective metallization of polymers through precise control of cold spraying parameters.
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Reports on the topic "PEEK polymer"

1

Detzel, Martin, Peter Mitschang, and Ulf Breuer. Influence of the processing temperature in the calendaring process of staple fiber yarns on the degree of consolidation and the thermal properties. Universidad de los Andes, 2024. https://doi.org/10.51573/andes.pps39.gs.pc.1.

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In this study, carbon/polyamide 6 staple fiber yarns were heated above the melting temperature of the polymer in a modified impregnation and calendaring process using two hot air blowers, stretched to align the fibers in the yarns, and formed into tapes. Tapes were produced at different process temperatures and the influences on the degree of consolidation and the thermal properties of the tapes were characterized. While improved impregnation quality can be achieved at higher temperatures, a decrease in the crystallization peak temperature of the impregnated tape was observed, indicating thermal degradation.
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2

Rimdusit, Sarawut. Comparative study on flexibility enhancement of polybenzoxazine using epoxy and urethane prepolymers. Chulalongkorn University, 2004. https://doi.org/10.58837/chula.res.2004.73.

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The flexibility of polybenzoxazine (BA) can substantially be improved by alloying with IPDI-based urethane prepolymers (PU) or with flexible epoxy (EPO732). The experimental results, i.e. flexural testing and dynamic mechanical analysis, reveal that flexibility of the rigid polybenzoxazine and the PU or th EPO732 alloys systematically increases with the amount of both tougheners due to the added flexible molecular segments in the polymer hybrids. The curing temperature of the benzoxazine resin at about 225 degree celcius shifts to a higher value when the fraction of BA in both resin mixtures decreases. Interestingly, the synergism in glass transition temperature (Tg) obtained from the peak of loss modulus in the dynamic mechanical analysis of BA/PU alloys is clearly observed, i.e. Tg of the BA/PU alloys are significantly greater (Tg beyond 200 degree celcius) than those of the parent resins, i.e. BA (Tg = 165 degree celcius) and PU (Tg = -70 degree celcius). However, this synergistic characteristic is not observed in the BA/EPO732 alloy systems. The synergistic Tg of BA/PU alloy at 70/30 mass ratio is found to be 221 degree celcius while that of BA/EPO732 at the same mass ratio is reported to be of only 95 degree celcius and further decreases with the amount of epoxy fraction. The phenomenon is explained by the ability of the PU fraction to substantially enhance the crosslinked density of the polymer alloys thus create the more connected network structure of the resulting alloys whereas the EPO732 shows almost negligible effects on the alloys crosslinked density or even reduce the alloy’s crosslinked density when the amount of this flexible epoxy is greater than 50wt%. Furthermore, the degradation temperature based on the 5% weight loss of the TGA thermograms of BA/PU alloys is found to be improved with the presence of the PU while the opposite trend is observed in BA/EPO732 systems. Finally, the char yield of both alloy systems is steadily enhanced with increasing the amount of the benzoxazine fraction due to the inherent high char yield of the benzoxazine resin comparing with the other two tougheners. The toughened polybenzoxazine using IPDI-based urethane prepolymer, e.g. 70/30 BA/PU, is thus the promising system for a tough and high thermal stability polymeric network for bulk or composite matrix applications.
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3

Chirachanchai, Suwabun. A New approach for the synthesis of advanced polymers by stereochemically controlled structure using inclusion polymerization technique. Chulalongkorn University, 1999. https://doi.org/10.58837/chula.res.1999.73.

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Inclusion compound of deoxycholic acid (DCA) host molecule and vinyl chloride monomer (VCM) guest molecule is prepared from solvent free DCA crystal via guest insertion technique. Solvent free DCA inclusion compound is achieved from a series of DCA-solvent guest, i.e., ethylacetate, dioxane, o- and p-xylene. X-ray diffraction, FT-IR and thermal analysis results indicate that vinyl chloride monomer is entrapped and stabilized in DCA crystal in solvent free DCA. Guest releasing peak of DCA-VCM is confirmed at ca. 40-60 degree Celsius. Inclusion polymerization is accomplished from the [gamma]-radiation for total dose 20 KGy. Followed by post polymerization at – 15 degree Celsius for two days. The obtained product is confirmed to be polyvinyl chloride by structural analysis. Glass transition temperature of the obtained product is 8-10 degree Celsius higher than the commercial one, while characteristic peaks at 1500-1100 cm [subscript -1] studied by FT-IR show the sharp peaks of which imply that the obtained PVC contains stereoregularity portion in the polymer chain.
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4

พงษ์สามารถ, สุนันท์, วิมลมาศ ลิปิพันธ์, ธิติรัตน์ ปานม่วง, ไกรสีห์ อัมพรายน์, เครือวัลย์ เอกรักษาศิลปชัย та นิจศิริ เรืองรังษี. การพัฒนาสารโพลี่แซคคาไรด์จากเปลือกของผลทุเรียน เพื่อใช้ทางการเภสัชกรรม : รายงานการวิจัย. จุฬาลงกรณ์มหาวิทยาลัย, 2001. https://doi.org/10.58837/chula.res.2001.27.

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เจลโพลี่แซคคาไรด์ (PG) และเส้นใยโพลี่แซคคาไรด์ (PF) สกัดได้จากเปลือกแห้งของผลทุเรียน (Durio zibethinus L.) ได้สารสกัด PG และ PF ประมาณ 7.3% และ 15.1% ของเปลือกแห้งตามลำดับ การวิเคราะห์ธาตุ พบว่าประกอบด้วย carbon (C) hydrogen (H) และ oxygen (O) ในอัตราส่วนอะตอมเท่ากับ 2.9:5.7:3.2 และ 3.5:6.4:3.1 ใน PG และ PF ตามลำดับและไม่พบมี nitrogen (N) และ sulfur (S) ในโพลี่แซคคาไรด์ทั้งสองชนิด PG มีส่วนประกอบของเส้นใย 96.3+-0.7% ซึ่งไม่พบมีเส้นใยอยู่ใน PF ผลการวิเคราะห์เกลือแร่ใน PG และ PF พบมีองค์ประกอบของโซเดียม โปแตสเซียม แคลเซียม แมกนีเซียม และมีจำนวนน้อยมากของเหล็ก ทองแดงสังกะสีและแมงกานีส องค์ประกอบของน้ำตาลจากการวิเคราะห์ในสารละลาย acid hydrolyzate ของ PG และ PF โดยเทคนิค TLC และ HPLC ให้ผลว่า PG มีส่วนประกอบแสดงให้เห็น spots และ peaks ของน้ำตาลที่ตรงกับน้ำตาลมาตรฐาน rhamonse arabinose fructose glucose และ galacturonic acid พบว่า PF ประกอบด้วย หนึ่ง peak ของน้ำตาลที่ตรงกับน้ำตาลมาตรฐาน glucose ผลของ IR spectra และ X-ray diffraction patterns แสดงให้เห็นว่า PG มี band ของ IR spectrum ที่แตกต่างที่ 1749 cm[superscript -1] (C=O) 1639 cm[superscript -1] (COO) และ 1019-1105 cm[superscript -1] (C-OH) ที่อาจแสดงถึงหมู่ carbonyl ที่ไม่พบอยู่ใน PF พบว่า PG เป็น amorphous powder จากผล X-ray diffraction profiles ขณะที่ PF แสดงให้เห็นเป็น crystalline powder คล้ายกับ cellulose powder พบว่า PG มีขนาดโมเลกุล 500-1,400 kDa จากการตรวจสอบโดยใช้ Sepharose 4B column chromatography การศึกษาคุณสมบัติทางชีวภาพของ PG ให้ผลว่า PG ทนต่อการถูกย่อยด้วยเอนไซม์ alpha-amylase และในความเข้มข้น 2% ของ PG สามารถกักเก็บ cholesterol ได้ถึง 86% ไว้ภายใน dialysis membrane จากการศึกษาในหลอดทดลองเมื่อผสม PG และ cholesterol ร่วมกับเกลือนำดี และทำการ dialyze นาน 10 ชั่วโมง ใน Ringer lactate buffer pH7 และมีเพียง 5% ของ cholesterol ถูกปล่อยออกมาภายนอก dialysis membrane PG มีฤทธิ์การยับยั้งเชื้อที่ทดลอง S. aureus และ E. coli บนจานเลี้ยงเชื้อของอาหารเลี้ยงเชื้อ MNG agar เมื่อมี 1.25% และ 2.5%PG ตามลำดับ จากการทดลอง Agar Diffusion Test โดยเห็นขอบของ inhibition zone ชัดเจน การทดลอง Broth Dilution Test โดยใช้ MN broth ที่มี glucose และที่มี PG ผลการทดลองแสดงให้เห็นว่า 1%PG ยับยั้งการเจริญของเชื้อ E. coli และ S. aureus พบมี colony count ที่ 24 ชั่วโมงลดลงถึง 0 และ 15% ตามลำดับ ผลการทดลองที่น่าสนใจพบว่า 0.02%PG ใน normal saline ให้ผลเกิดการฆ่าเชื้อ S. aureus และ E. coli พบมี colony count ลดลงถึง 0 หลังการบ่มเชื้อนาน 24 ชั่วโมงที่ 37 องศาเซลเซียส ขณะที่พบมีจำนวนเซลล์ระดับต่ำอยู่ใน normal saline และใน distilled water ที่ใช้เป็น control จากการเก็บเชื้อไว้นานถึง 1 และ 2 สัปดาห์ตามลำดับ ผลการทดลองกับสองสายพันธุ์ของ yeast คือ C. albicans และ S. cerevisiae ไม่ไวต่อการยับยั้งการเจริญโดย PG จากในการทดลองนี้และการใช้ประโยชน์ PG และ PF พบว่ามีประโยชน์ใช้ได้ในการเตรียม เภสัชผลิตภัณฑ์และเตรียมผลิตภัณฑ์อาหาร ได้ผลว่าสารละลายน้ำ 3%PG และสูตรสารผสมของ 2.6%PG กับ 2.7% cellulose derivative polymer (HPMC E15) สามารถใช้เป็นน้ำยาเคลือบในการเคลือบยาเม็ดเคลือบได้ผลที่น่าพอใจ การเตรียมสูตรอาหารโดยใช้ PG ปริมาณ 3% ร่วมกับ 0.5%PF และ 2% fructose พบว่าได้สูตร instant food powder ที่พร้อมผสมน้ำก่อนดื่มที่น่าพอใจ ผลิตภัณฑ์อาหารกระจายตัวและผสมได้รวดเร็วเป็นเนื้อเดียวในน้ำภายใน 5-10 นาที มีเนื้อค่อนข้างเนียน มีตะกอนน้อยมากเมื่อตั้งทิ้งไว้ มีรสเปรี้ยวอมหวานเล็กน้อย มีความหนืด 503 cps. และดื่มได้ง่ายซึ่งอาจเหมาะสำหรับใช้เป็นอาหารทางการแพทย์ประเภทอาหารควบคุมน้ำหนัก
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