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Journal articles on the topic 'Polymers; Thermoplastics'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Pyshyev, Serhiy, Volodymyr Gunka, Yuriy Grytsenko, and Michael Bratychak. "Polymer Modified Bitumen: Review." Chemistry & Chemical Technology 10, no. 4s (2016): 631–36. http://dx.doi.org/10.23939/chcht10.04si.631.

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The main reasons and ways of bitumen modification by polymers were examined. Positive and negative aspects of the usage of different polymer modifiers (elastomers, thermoplastic elastomers, reactive polymers, thermoplastics) were analysed. The authors’ achievements concerning modification of bitumen by various polymers, namely indene-coumarone, petroleum, phenol-formaldehyde and epoxy resins, were described.

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Carotenuto, G., M. L. Nadal, P. Repetto, P. Perlo, L. Ambrosio, and L. Nicolais. "New Polymeric Additives for Allowing Photoelectric Sensing of Plastics during Manufacturing." Advanced Composites Letters 16, no. 3 (2007): 096369350701600. http://dx.doi.org/10.1177/096369350701600303.

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Metallic mercaptides are inert organic compounds (i.e., Mex( SR) y) that can be used to make thermoplastic polymers high luminescent to UV-light. Luminescence is strictly required in polymer manufacturing since this characteristic allows detection of polymer pieces by photoelectric sensors. Luminescent Au, CdS, and ZnS nanoparticles can be generated into thermoplastics like: polystyrene, polycarbonate, poly(vinyl acetate), etc. by thermolysis of the corresponding mercaptides. PL spectra of polymeric films embedding these nanoparticles show intensive visible light emission in different spectral

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3

Kohutiar, Marcel, Mariana Pajtášová, Róbert Janík, et al. "Study of selected thermoplastics using dynamic mechanical analysis." MATEC Web of Conferences 157 (2018): 07002. http://dx.doi.org/10.1051/matecconf/201815707002.

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The aim of given paper is to study selected polymers using dynamic mechanical analysis method (DMA). DMA is one of the most useful techniques for the study of the viscoelastic behaviour of thermoplastic polymers. In relation to DMA, an oscillatory stress and strain is applied to the material at specific frequencies and temperatures and based on this mentioned fact hereinbefore, the resulting changes after the loading in the material are measured. This technique allows detecting the melting temperature and the glass transition temperature of the thermoplastic materials. Furthermore, some spectr

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Gaidamak, Oleg, Viktor Matviychuk, and Yulia Kucherenko. "PROSPECTS FOR THE CREATION OF POLYMER FUNCTIONAL COATINGS WITH THE APPLICATION OF GASODYNAMIC DRAINING." ENGINEERING, ENERGY, TRANSPORT AIC, no. 2(109) (August 27, 2020): 105–12. http://dx.doi.org/10.37128/2520-6168-2020-2-11.

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This article is devoted to the equipment for gas-dynamic spraying in order to simplify its design, to provide the possibility of adjusting the parameters (temperature, pressure, speed, ejection) of the air-polymer flow, and to clarify the fundamental possibility of creating polymer functional coatings with gas-dynamic spraying. The polymeric materials, depending on their brand, are completely inert and do not react in any chemical reaction with food, animal waste products, acids and other corrosive media. It is known that polymeric materials can be attributed to the two main classes of reactan

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Dharmarajan, N., and L. G. Kaufman. "High Flow TPO Compounds Containing Branched EPDM Modifiers." Rubber Chemistry and Technology 71, no. 4 (1998): 778–94. http://dx.doi.org/10.5254/1.3538504.

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Abstract Polymer blends of ethylene-propylene elastomers and polypropylene plastics, referred to as thermoplastic olefins, are finding increasing use in automotive applications. The combination of attractive mechanical properties, low raw material cost and recyclability make these materials ideal substitutes for expensive engineering thermoplastics (polycarbonate/polybutylene terephthalate alloys) and nonrecyclable polyurethane systems. The primary application is in automotive bumper fascia. This paper describes the addition of long chain branched ethylene-propylene elastomers in thermoplastic

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Bourne, N. K., S. C. Garcea, D. S. Eastwood, et al. "On compression and damage evolution in two thermoplastics." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 473, no. 2197 (2017): 20160495. http://dx.doi.org/10.1098/rspa.2016.0495.

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The well-known Taylor cylinder impact test, which follows the impact of a flat-ended cylindrical rod onto a rigid stationary anvil, is conducted over a range of impact speeds for two polymers, polytetrafluoroethylene (PTFE) and polyetheretherketone (PEEK). In previous work, experiments and a model were developed to capture the deformation behaviour of the cylinder after impact. These works showed a region in which spatial and temporal variation of both longitudinal and radial deformation provided evidence of changes in phase within the material. In this further series of experiments, this regi

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Hopmann, Christian, and Suveni Kreimeier. "Modelling the Heating Process in Simultaneous Laser Transmission Welding of Semicrystalline Polymers." Journal of Polymers 2016 (October 27, 2016): 1–10. http://dx.doi.org/10.1155/2016/3824065.

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Laser transmission welding is an established joining process for thermoplastics. A close-to-reality simulation of the heating process would improve the understanding of the process, facilitate and shorten the process installation, and provide a significant contribution to the computer aided component design. For these reasons a thermal simulation model for simultaneous welding was developed which supports determining the size of the heat affected zone (HAZ). The determination of the intensity profile of the laser beam after the penetration of the laser transparent semicrystalline thermoplastic

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8

Chukov, Dilyus I., Sarvarkhodza G. Nematulloev, Viсtor V. Tсherdyntsev, et al. "Structure and Properties of Polysulfone Filled with Modified Twill Weave Carbon Fabrics." Polymers 12, no. 1 (2019): 50. http://dx.doi.org/10.3390/polym12010050.

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Carbon fabrics are widely used in polymer based composites. Nowadays, most of the advanced high-performance composites are based on thermosetting polymer matrices such as epoxy resin. Thermoplastics have received high attention as polymer matrices due to their low curing duration, high chemical resistance, high recyclability, and mass production capability in comparison with thermosetting polymers. In this paper, we suggest thermoplastic based composite materials reinforced with carbon fibers. Composites based on polysulfone reinforced with carbon fabrics using polymer solvent impregnation wer

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9

Dealy, John M. "Rheology of Molten Polymers." MRS Bulletin 16, no. 8 (1991): 24–26. http://dx.doi.org/10.1557/s0883769400056281.

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The term “polymeric liquids” is used to describe both solutions of polymers and molten polymers. All polymeric liquids exhibit non-Newtonian flow behavior, including a shear stress-dependent viscosity and elasticity. However, concentrated solutions and melts of polymers whose molecular weights exceed a certain critical value (the “critical molecular weight for entanglement,” Mc) exhibit quite remarkable deviations from classical fluid behavior, especially marked elasticity. Among the remarkable rheological phenomena exhibited by these materials are elastic recoil and flow-induced an-isotropy.

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Mangaraj, D. "Role of Compatibilization in Recycling Rubber Waste by Blending with Plastics." Rubber Chemistry and Technology 78, no. 3 (2005): 536–47. http://dx.doi.org/10.5254/1.3547895.

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Abstract Blending ground rubber with thermoplastic and thermoset polymers is a very cost effective and efficient method for recycling rubber waste. However it is important for vulcanized rubber particles and the thermoplastic matrix to adhere to each other to form co-continuous type morphology to provide necessary strength properties. The paper discusses the principles underlying compatibilization and discusses the three types, namely mechanical, non-reactive and reactive compatibilization. Past work in compatibilizing ground rubber from tire waste (GRT) with thermoplastics has been reviewed a

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11

Prabhakaran, R. T. Durai, Aage Lystrup, and Tom Løgstrup Andersen. "Attribute Based Selection of Thermoplastic Resin for Vacuum Infusion Process." International Journal of Manufacturing, Materials, and Mechanical Engineering 1, no. 3 (2011): 31–52. http://dx.doi.org/10.4018/ijmmme.2011070104.

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The composite industry looks toward a new material system (resins) based on thermoplastic polymers for the vacuum infusion process, similar to the infusion process using thermosetting polymers. A large number of thermoplastics are available in the market with a variety of properties suitable for different engineering applications, and few of those are available in a not yet polymerised form suitable for resin infusion. The proper selection of a new resin system among these thermoplastic polymers is a concern for manufactures in the current scenario and a special mathematical tool would be bene

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Et. al., Balwant Singh,. "Processing and Recycling of thermoplastic polymers: Current Scenario and Future Challenges." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 2 (2021): 2744–53. http://dx.doi.org/10.17762/turcomat.v12i2.2303.

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Thermoplastic polymers are extensively utilized in electronics, aerospace, automobile and additive manufacturing industries due to low cost, low temperature processing and reusability. Thermoplastics of different grades and chemical structures arereadily available in the market They can be reusedand reshaped, and also can be manufactured with less weight proportion as compared to the metals and ceramics by providing same strength of material. As a result, the plastics products in the market are getting popular day by day with high demand of customized products due to inception of additive manu

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den Doelder, C. F. J., R. L. Sammler, R. J. Koopmans, and A. N. Paquet. "Modeling Foam Growth in Semi-Crystalline Thermoplastics." Cellular Polymers 21, no. 2 (2002): 99–116. http://dx.doi.org/10.1177/026248930202100201.

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The accurate description of the rapidly changing viscoelastic character of the gas-laden polymer melt during the expansion phase of foam development is one of the main challenges in modeling thermoplastic foam processing. A general model addressing this challenge for amorphous and semi-crystalline polymers is presented here. Key model elements include the capturing of strain hardening in extensional flow and flow-induced crystallization. The extensional rheology is modeled using the Lodge constitutive equation. The crystallization is modeled using the Avrami equation enhanced with a flow-induc

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Vakhtinskaya, T. N., L. N. Gurinovich, and T. I. Andreeva. "Schungite-Filled Thermoplastics." International Polymer Science and Technology 31, no. 8 (2004): 47–49. http://dx.doi.org/10.1177/0307174x0403100811.

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NIEMIEC, Aneta, Maciej KUJAWA, and Wojciech WIELEBA. "THE EFFECT OF THE IONIZING RADIATION ON THE TRIBOLOGICAL PROPERTIES OF THERMOPLASTIC POLYMERS RUBBING AGAINST STEEL." Tribologia 269, no. 5 (2016): 133–45. http://dx.doi.org/10.5604/01.3001.0010.6614.

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The paper describes the effects of gamma radiation doses on the tribological and mechanical properties of selected thermoplastic polymers: PEEK, PEI, PET, and PA6. Samples of those polymers were irradiated with gamma rays of energy 1, 1.2, 3, 4, 5 MeV and with the intensity of the radiation beam 4, 7, 10, 30, 40 μA. With an increasing dose of radiation, properties such as microhardness, the friction coefficient of polymers, and the wear rate are changed. The chemical structure of the irradiated polymer may be changed by crosslinking but also by chain scission. The modified polymers may be used

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Jayaraman, Krishnan, and Rex Halliwell. "Blending of Natural Fibres and Thermoplastics by Screwless Extrusion." Advanced Materials Research 47-50 (June 2008): 1141–44. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.1141.

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Natural fibres, such as sisal, flax and woodfibres, are relatively inexpensive and originate from renewable resources. Thermoplastic polymers, such as polypropylene (PP), high density polyethylene (HDPE) and waste plastics, possess shorter manufacturing cycle times and reprocessability. Natural fibre-reinforced thermoplastic composite materials exhibit favourable values of modulus and strength when the fibres are properly compounded with the polymers. Common methods for manufacturing natural fibre-reinforced thermoplastic composites, injection moulding and extrusion, require pre-compounding of

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Enger, Marco, and Pavel Blaškovitš. "Application of Nanotechnology for Anti-Friction Coatings." Research Papers Faculty of Materials Science and Technology Slovak University of Technology 21, Special-Issue (2013): 50–60. http://dx.doi.org/10.2478/rput-2013-0009.

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Abstract Different slide-active coatings for thermoplastic surfaces, based on a new binder technology, were investigated for their use as slide element in the automobile interior. The main focus of this paper is the determination of the sliding behaviour of the coated thermoplastics in direct comparison to the uncoated variants. The coatings showed clearly different slide motion properties concerning their friction coefficient and stick-slip behaviour. In a direct comparison with the currently used polymers a clear improvement of slide properties could be achieved.

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18

Nied, H. F., and V. K. Stokes. "Solid Phase Sheet Forming of Thermoplastics—Part II: Large Deformation Post-Yield Behavior of Plastics." Journal of Engineering Materials and Technology 108, no. 2 (1986): 113–18. http://dx.doi.org/10.1115/1.3225847.

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This paper examines the phenomenology of the large strain, post-yield behavior of the three thermoplastics—polycarbonate, polybutylene terephthalate and polyetherimide—from the point of view of the sheet forming process. A photographic technique is utilized to measure the large nonhomogeneous strains observed in polymers. This technique makes possible the mapping of the strain field for flat specimens in the form of strain contours. Amorphous polymers polycarbonate and polyetherimide are shown to behave differently from semicrystalline polybutylene terephthalate. All three polymers are shown t

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Yen, Chia-Yi, Moh-Ching Chang, Zong-Fu Shih, Yi-Hsing Lien, and Chia-Wen Tsao. "Cyclic Block Copolymer Microchannel Fabrication and Sealing for Microfluidics Applications." Inventions 3, no. 3 (2018): 49. http://dx.doi.org/10.3390/inventions3030049.

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High mechanical rigidity, chemical resistance, and ultraviolet-visible light transmissivity of thermoplastics are attractive characteristics in microfluidics because various biomedical microfluidic devices require solvent, acid, or base manipulation, and optical observation or detection. The cyclic block copolymer (CBC) is a new class of thermoplastics with excellent optical properties, low water absorption, favorable chemical resistance, and low density, which make it ideal for use in polymer microfluidic applications. In the polymer microfabrication process, front-end microchannel fabricatio

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Rus, Anika Zafiah Mohd, Nurul Syamimi M. Salim, and M. F. Idaris. "Processing of Sustainable Polymer with Thermoplastics by Injection Moulding." Applied Mechanics and Materials 799-800 (October 2015): 57–61. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.57.

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Among different natural oils, recycling of waste vegetable oils from palm oil is widely explored for polyol synthesis to prevent pollution of waterways and clogging private and municipal drain systems, restaurants and other food preparation. The polyol is solidifying using cross linker and known as Sustainable Polymer (SP). SP is compounded with High-Density Polyethylene (HDPE) and Low-Density Polyethylene (LDPE) by melt-mixing using an injection molding machine. The effect of polymer compounding ratio on the mechanical properties was studied by tensile test. The result indicated that increasi

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Mirski, Radosław, Aleksandra Banaszak, and Pavlo Bekhta. "Selected Properties of Formaldehyde-Free Polymer-Straw Boards Made from Different Types of Thermoplastics and Different Kinds of Straw." Materials 14, no. 5 (2021): 1216. http://dx.doi.org/10.3390/ma14051216.

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This research investigated the effects of different thermoplastics types and different kinds of straw on selected properties of polymer-straw boards. Polyethylene, polyethylene, and polystyrene of virgin and of recycled origin were used for bonding the boards. Three kinds of straw were used: rape (Brassica napus L. var. napus), triticale (Triticosecale Witt b m.), and rye (Secale L.). Five-layer polymer-straw boards were produced. The obtained boards differed in both the materials they were made of and the moisture content (7, 25, and 2% for the core, the middle, and the face layers, respectiv

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Erenkov, O. Yu, S. A. Kovalchuk, and S. N. Khimukhin. "Research of Thermoplastics Turning after Workpiece Ultrasonic Treatment." Materials Science Forum 945 (February 2019): 470–75. http://dx.doi.org/10.4028/www.scientific.net/msf.945.470.

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The results of experimental studies of a new method for turning billets from thermoplastic polymers such as caprolon and fluoroplastic are presented. The technical essence of the method is in workpiece advanced processing by ultrasonic vibrations using preliminary machining. Experimental studies were carried out on a lathe which is equipped with an ultrasonic oscillatory system. Roughness level profilograms of the caprolon and fluoroplastic treated surfaces are used for visual and operational control of the turning process. The results of the experimental verification of the developed method c

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Petrova, G. N., N. M. Abakumova, T. V. Rumyantseva, et al. "Fireproof Injection-Moulding Thermoplastics." International Polymer Science and Technology 32, no. 9 (2005): 53–54. http://dx.doi.org/10.1177/0307174x0503200912.

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Brogan, J. A. "Thermal-Spraying of Polymers and Polymer Blends." MRS Bulletin 25, no. 7 (2000): 48–53. http://dx.doi.org/10.1557/mrs2000.124.

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Thermal-spraying of polymers can be traced back to the 1940s, when polyethylene (PE) was first produced by E.I. du Pont de Nemours & Company. Early work with flame-spraying guns was unsuccessful because the equipment, designed for spraying metals, produced a flame that was both too hot and too short to melt the PE without degradation. The technology has advanced considerably in the past 20 years. Flame-spray equipment and hardware accessories have been designed by numerous companies (PFS Thermoplastics, Alamo, Eutectic + Castolin, etc.) specifically for polymeric materials. The new equipme

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Kalužová, Alena, Jan Pěnčík, Libor Matějka, Libor Matějka, Tomáš Pospíšil, and Darina Dostálová. "Production of Thermal Insulation Composite Material Based on Polymers." Advanced Materials Research 535-537 (June 2012): 239–42. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.239.

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Recycling of materials is an important point of sustainable construction. The aim is to find a compromise between energy saving, economy and ecology. The contribution discusses the production of thermal insulation composite material made of polymers. Uniform dispersion of grains of foamy glass waste (filler) in polymer filling from recycled thermoplastics induces formation of particle composite. The production supports usage of secondary raw materials. Decisive properties in choosing the materials to be applied include mainly the coefficient of thermal conductivity, density, compressive streng

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Kumar, K. Vijaya, Mir Safiulla, and A. N. Khaleel Ahmed. "AN EXPERIMENTAL EVALUATION OF FIBER REINFORCED POLYPROPYLENE THERMOPLASTICS FOR AEROSPACE APPLICATIONS." Journal of Mechanical Engineering 43, no. 2 (2014): 92–97. http://dx.doi.org/10.3329/jme.v43i2.17832.

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Fiber reinforced thermosetting composites have wide scope in the field of Aerospace and MilitaryApplications. These materials exhibit high strength and high stiffness, besides these composites have long fatiguelife, corrosion resistance, environmental stability, thermal insulation and conductivity. Researchers areexploring possibilities to use natural fiber reinforced polymer composites (NFRPCs) in response to the increasingdemand for environmentally friendly materials and also to develop reusable fiber reinforced thermoplastics withthe desire to reduce the cost and to promote the replacement

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Scavuzzo, Rudolph J. "Oscillating Stress on Viscoelastic Behavior of Thermoplastic Polymers." Journal of Pressure Vessel Technology 122, no. 3 (2000): 386–89. http://dx.doi.org/10.1115/1.556197.

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Polymers are used in many applications where they are subjected to cyclic stresses. PVC and HDPE piping are often used in systems that include rotating machinery that cause mechanical vibration. Recent testing of thermoplastics indicates that there may be a large effect on the viscoelastic strains of thermoplastics from oscillating stresses. Cyclic loading on the permanent set of cross-linked elastomers has been studied. Perhaps, as expected, the effect of the oscillating behavior is measurable. Two types of tests have been conducted. First, tensile tests on HDPE standard specimens were conduc

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Sebaey, Tamer A., Mohamed Bouhrara, and Noel O’Dowd. "Fibre Alignment and Void Assessment in Thermoplastic Carbon Fibre Reinforced Polymers Manufactured by Automated Tape Placement." Polymers 13, no. 3 (2021): 473. http://dx.doi.org/10.3390/polym13030473.

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Automated Tape Placement (ATP) technology is one of the processes that is used for the production of the thermoplastic composite materials. The ATP process is complex, requiring multiple melting/crystallization cycles. In the current paper, laser-assisted ATP was used to manufacture two thermoplastic composites (IM7/PEEK and AS4/PA12). Those specimens were compared to specimens that were made of thermoset polymeric composites (IM7/8552) manufactured while using a standard autoclave cycle. In order assess the quality, void content, fibre distribution, and fibre misalignment were measured. After

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Draghici, Sorin, Ionut Sebastian Vintila, Radu Mihalache, Horia Alexandru Petrescu, Catalin Stelian Tuta, and Anton Hadar. "Design and Fabrication of Thermoplastic Moulds for Manufacturing CFRP Composite Impeller Blades." Materiale Plastice 57, no. 1 (2020): 290–98. http://dx.doi.org/10.37358/mp.20.1.5338.

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The main objective of this study was to investigate thermoplastic materials design and fabrication processes for manufacturing composite impeller blades. Polyurethane (Necuron) and ABS (3D printed) thermoplastics were chosen due to their good mechanical properties, tooling applications, easy manufacturing and lifetime. For both thermoplastics, workability and hardness tests were performed, as well as microstructural and mechanical characterization evaluating their physical and mechanical properties. A 1:2.5 scale mould was designed and milled from Necuron N651 and N1001 and used for manufactur

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Delda, Ray Noel M., Brian Jumaquio Tuazon, and John Ryan Cortez Dizon. "Assessment of Interfacial Adhesion of Adhesively Bonded 3D-Printed Thermoplastics." Materials Science Forum 1005 (August 2020): 157–65. http://dx.doi.org/10.4028/www.scientific.net/msf.1005.157.

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The aim of this study is to evaluate the interfacial adhesion of Fused Deposition Model (FDM)-printed Acrylonitrile butadiene styrene (ABS) and Polylactic acid (PLA) bonded using commercially – available epoxy and elastomeric bonding agents. An adhesive was applied to the 3D printed specimen to quantify the interfacial resistance, the surface was then examined under an optical microscope in order to assess the reaction of the polymer to the adhesives. The results reported in the present work allow the conclusion of levels of bond improvement in the polymers.

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Nishita, Ryunosuke, Kosuke Kuroda, Shohei Ota, et al. "Flame-retardant thermoplastics derived from plant cell wall polymers by single ionic liquid substitution." New Journal of Chemistry 43, no. 5 (2019): 2057–64. http://dx.doi.org/10.1039/c8nj04797a.

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Kathirgamanathan, Poopathy. "Microwave welding of thermoplastics using inherently conducting polymers." Polymer 34, no. 14 (1993): 3105–6. http://dx.doi.org/10.1016/0032-3861(93)90641-m.

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Mudhukrishnan, M., P. Hariharan, and S. K. Malhotra. "Characterization of Glass Fibre/Carbon Fibre Hybrid Thermoplastics Composite Laminates Fabricated by Film Stacking Method." Applied Mechanics and Materials 787 (August 2015): 518–22. http://dx.doi.org/10.4028/www.scientific.net/amm.787.518.

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The Fibre Reinforced Plastic (FRP) composites are extensively used for a wide variety of applications in automobile, aerospace, chemical, biomedical and civil engineering fields due to their excellent properties. Composite materials offer significant advantages in strength-to-weight ratio and corrosion resistance over metallic materials. Initially FRP composites were based mainly on thermoset polymers because of the ease of manufacturing. But, recently FRP composites using thermoplastics matrices are gaining importance because of their advantages over thermoset composites. In the present work,

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Wang, Yi, Lech Muszynski, and John Simonsen. "Gold as an X-ray CT scanning contrast agent: Effect on the mechanical properties of wood plastic composites." Holzforschung 61, no. 6 (2007): 723–30. http://dx.doi.org/10.1515/hf.2007.117.

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Abstract Wood plastic composites (WPCs) are typically composed of wood particles, thermoplastic polymers and small amounts of additives. Further improvement of WPC technology requires a better understanding of their mechanical performance and durability on the micro level. X-ray computed tomography (CT) and advanced imaging techniques can provide visualization and support characterization of the internal structure, deformation and damage accumulation in WPCs under loading and various environmental exposures. However, both wood and thermoplastics are weakly attenuating materials for X-ray and g

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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)

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Nickels, Liz. "New innovations in automotive thermoplastics." Reinforced Plastics 63, no. 4 (2019): 185–88. http://dx.doi.org/10.1016/j.repl.2019.06.041.

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NIEMIEC, Aneta. "THE ANALYSIS OF THE INFLUENCE OF GAMMA IRRIADIATED POLYSULFONES ON THE STATIC FRICTION COEFFICIENT." Tribologia, no. 4 (August 31, 2017): 65–70. http://dx.doi.org/10.5604/01.3001.0010.5995.

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The paper presents the results of studies on the effects of gamma irradiation on the static friction coefficient of thermoplastic polymer – polysulfone. These polar polymers belong to the group of amorphous thermoplastics and are widely used for various applications, e.g., automotive and electronic industries (dielectrics in capacitors), waste water recovery, medical uses (hemodialysis membranes), requiring autoclave, and steam sterilization. Polysufones are known for their toughness and stability at high temperatures. The aim of this study is to analysed changes in the static coefficient of f

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Holzinger, Michael, Johannes Blase, Andreas Reinhardt, and Lothar Kroll. "New additive manufacturing technology for fibre-reinforced plastics in skeleton structure." Journal of Reinforced Plastics and Composites 37, no. 20 (2018): 1246–54. http://dx.doi.org/10.1177/0731684418763988.

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In order to process structural materials in additive manufacturing, a three-dimensional printing process with high deposition rate was developed. The process enables new design approaches for structural parts in automotive applications, combining continuous fibre-reinforced thermoplastics with short fibre-reinforced thermoplastics. For the combination of these materials, adhesion and the influence of the process parameters on adhesion is crucial. Within this study the adhesion has been measured in peel tests according to ASTM D, 6862, and the interface was investigated by optical microscopy. T

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Mapleston, Peter. "High-Performance Thermoplastics." Plastics Engineering 63, no. 6 (2007): 18–22. http://dx.doi.org/10.1002/j.1941-9635.2007.tb00131.x.

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KELAR, KRYSTYNA, DANUTA CIESIELSKA, and EWA BRATBORSKA. "Porous sintered thermoplastics." Polimery 31, no. 05 (1986): 174–75. http://dx.doi.org/10.14314/polimery.1986.174.

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Igumenov, M. S., and N. A. Lavrov. "Features of the Rotational Moulding of Thermoplastics." International Polymer Science and Technology 44, no. 10 (2017): 39–46. http://dx.doi.org/10.1177/0307174x1704401008.

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Features of the process of rotational moulding of thermoplastics have been examined. Heat transfer processes have been analysed. The influence of the particle size of the polymer on the distribution of the processed material within the rotational mould and on the duration of transition of the polymer from the solid to the viscous flow state has been studied. The dependence of the thickness uniformity of an article of linear polyethylene on the rotational speed of the mould has been examined.

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Hausberger, Andreas, Tanja Stiller, Clemens Kappl, Lars Hensgen, and Florian Grün. "Improving the Tribological Properties of Technical Polymers with Metal Sulphide Compounds." Lubricants 9, no. 9 (2021): 91. http://dx.doi.org/10.3390/lubricants9090091.

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Technical thermoplastic materials (e.g., PEEK, PPA and POM) are widely used for tribological applications combined with different filler systems (e.g., glass- or carbon fibres) because of their excellent mechanical properties. The friction and wear behaviour of thermoplastics can be specifically improved by solid lubrication systems such as graphite, PTFE and MoS2. Besides these systems, others such as WoS2 and MnS are becoming scientifically interesting. This work investigates the influence of different solid lubricants—alternative metal sulphides and polymer-based—in combination with differe

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Wright, Kathryn J., and Alan J. Lesser. "Initial Development of Structure—Property Relationships for Dynamically Vulcanized EPDM/IPP Elastomers." Rubber Chemistry and Technology 74, no. 4 (2001): 677–87. http://dx.doi.org/10.5254/1.3544966.

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Abstract The mechanical behavior and morphology of dynamically vulcanized blends of ethylene—propylene—diene monomer and isotactic polypropylene are investigated. The composition of the thermoplastic elastomers dictates their morphology, which in turn controls their mechanical behavior. Six compositions are examined under quasi-static and dynamic mechanical loading conditions. Although these elastomers are processable thermoplastics, they all exhibit a Payne effect much like traditional crosslinked materials. However, the mechanisms responsible for this behavior are different than those of cro

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Coran, A. Y., R. Patel, and D. Williams-Headd. "Rubber-Thermoplastic Compositions. Part IX. Blends of Dissimilar Rubbers and Plastics with Technological Compatibilization." Rubber Chemistry and Technology 58, no. 5 (1985): 1014–23. http://dx.doi.org/10.5254/1.3536097.

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Abstract From this work, one can conclude that compositions which have excellent mechanical properties can be prepared by melt-mixing thermoplastic vulcanizates. (A thermoplastic vulcanizate is a composition containing vulcanized rubber particles dispersed in a thermoplastic. Such a composition is usually prepared by vulcanizing the rubber during its melt-mixing with a thermoplastic.) The excellent mixed TPV compositions can be obtained even though the rubbers and plastics are mutually grossly incompatible with respect to thermodynamic considerations. In such cases, however, it appears to be n

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Nobile,, M. R., D. Acierno,, E. Amendola,, L. Incarnato,, K. Nicolais,, and C. Carfagna,. "Self-Reinforced Polymer Composites: Blends of Thermoplastics and Thermo tropic Liquid Crystalline Polymers." Science and Engineering of Composite Materials 1, no. 4 (1989): 129–39. http://dx.doi.org/10.1515/secm.1989.1.4.129.

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Amjadi, Mohammad, and Ali Fatemi. "A Fatigue Damage Model for Life Prediction of Injection-Molded Short Glass Fiber-Reinforced Thermoplastic Composites." Polymers 13, no. 14 (2021): 2250. http://dx.doi.org/10.3390/polym13142250.

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Short glass fiber-reinforced (SGFR) thermoplastics are used in many industries manufactured by injection molding which is the most common technique for polymeric parts production. Glass fibers are commonly used as the reinforced material with thermoplastics and injection molding. In this paper, a critical plane-based fatigue damage model is proposed for tension–tension or tension–compression fatigue life prediction of SGFR thermoplastics considering fiber orientation and mean stress effects. Temperature and frequency effects were also included by applying the proposed damage model into a gener

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Timofeenko, A. A., V. V. Timoshenko, E. A. Shutova, and V. M. Shapovalov. "Physico-mechanical and technological characteristics of composite materials based on mixtures of secondary thermoplastics." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 65, no. 2 (2020): 162–69. http://dx.doi.org/10.29235/1561-8358-2020-65-2-162-169.

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The physico-mechanical and technological characteristics of mixed waste of thermoplastic polymers, including that from the recyclable electronic and electrical equipment based on ABS plastic, were investigated. Target modifying additives were introduced into the composite system to improve the compatibility of polymer components of mixtures and the stable rheological properties of composition during processing. It is established that the secondary polymers behavior in their mixtures is caused by combination of their rheological characteristics and other parameters of mutual compatibility, that

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KUJAWA, Maciej, and Wojciech WIELEBA. "THE INFLUENCE OF A CONSTANT STATE OF DEFORMATION ON THE FRICTION COEFFICIENT IN SELECTED THERMOPLASTICS (POLYMER–STEEL PAIR)." Tribologia, no. 4 (August 31, 2017): 39–45. http://dx.doi.org/10.5604/01.3001.0010.5992.

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The effect of tensile deformation on polymer structures and their mechanical properties is described in various papers. However, the majority of articles are focused on high deformation (a few hundred percentiles) at increased temperature. It causes changes in orientation and the crystallinity ratio. The authors of this paper asses the influence of strain (max. 50%) on hardness and the coefficient of friction (polymer–steel A1 couple) for selected polymers. The deformation was conducted at room temperature and maintained during tests. There was a significant reduction (up to 50%) of hardness a

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Fernandes, Fábio A. O., António B. Pereira, Bernardo Guimarães, and Tiago Almeida. "Laser Welding of Transmitting High-Performance Engineering Thermoplastics." Polymers 12, no. 2 (2020): 402. http://dx.doi.org/10.3390/polym12020402.

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Laser processing is a rapidly growing key technology driven by several advantages such as cost and performance. Laser welding presents numerous advantages in comparison with other welding technologies, providing high reliability and cost-effective solutions. Significant interest in this technology, combined with the increasing demand for high-strength lightweight structures has led to an increasing interest in joining high-performance engineering thermoplastics by employing laser technologies. Laser transmission welding is the base method usually employed to successfully join two polymers, a t

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Behrens, Bernd-Arno, Klaus Dröder, Kai Brunotte, et al. "Numerical Modelling of Bond Strength in Overmoulded Thermoplastic Composites." Journal of Composites Science 5, no. 7 (2021): 164. http://dx.doi.org/10.3390/jcs5070164.

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Overmoulding of thermoplastic composites combines the steps of thermoforming and injection moulding in an integrated manufacturing process. The combination of continuous fibre-reinforced thermoplastics with overmoulded polymer enables the manufacturing of highly functionally integrated structures with excellent mechanical properties. When performed as a one-shot process, an economically efficient manufacturing of geometrical complex lightweight parts within short cycle times is possible. However, a major challenge in the part and process design of overmoulded thermoplastic composites (OTC) is

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