Relevant bibliographies by topics / Inorganic polymers. Copolymers. Polymeric composites

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Inorganic polymers. Copolymers. Polymeric composites'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Inorganic polymers. Copolymers. Polymeric composites"

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Zinchenko, О. V., V. D. Ezhova, and A. L. Tolstov. "SILICON-CONTAINING OLIGOMERIC AZOINITIATORS IN THE SYNTHESIS OF BLOCK COPOLYMERS." Polymer journal 43, no. 2 (2021): 133–42. http://dx.doi.org/10.15407/polymerj.43.02.133.

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A solvothermal synthetic pathway and functional polymer styabilizers was used for synthesis of fine silver structures of different architecture. Using polyvinylpyrrolidone as a stabilizer silver micronized wires with a diameter of 3,8–4,2 μm and aspect ratio of up to 30 were prepared. XRD technique was applied for qualitative determination of silver metal structures. New thermoresponse composite hydrogels with a structure of semi-IPNs were prepared from cross-linked polyvinyl alcohol, linear highly hydrophilic poly(2-ethyl-2-oxazoline) (PEtOx) and as-synthesized silver micro-sized wires. Effect of a structure and a composition of the polymer matrix, and inorganic anisotropic filler on structure arrangement of composite hydrogels were evaluated by DMA studies. A presence of linear hydrophilic PEtOx and anisotropic metal filler in PVA matrix reduces storage modulus Е’ from 275 to 222–230 MPa and increases loss modulus Е” up to 45,5 MPa at room temperature measurements that partially initiated by poor structuration ability of the composites under high solvation level of polymer matrices. Increasing temperature leads to redistribution of hydrogen bonds network and hybridization of PVA nad PEtOx macrochains and enhances energy dissipation ability of unfilled hydrogel. A filler due to conjugation with amine-functionalized PEtOx chains and its localization closed to a surface of metal supresses polymer-polymer interactions and elasticity parameters of composite matrix drops down. As a result, diffusion and permeability coefficients of composite hydrogels reaches 1,06–1,52·10–9 cm2/s and 0,83–1,09·10-9 g/(cm·s), respectively, that higher in comparison with cross-linked PVA matrices. A presence of hydrogen bonds of different energy in hydrogels provides an appearance of multiple relaxation transitions due to different macrochain mobility in a bulk of polymer matrix. Differences of temperature interval of LCTS for hydrogels were found from analysis Е”(T)/dT (62–70 °С) and Δχ(T)/dT (67–70 °С) dependencies are interrelated with kinetic pecularities of diffusion processes that are able to suppress a phase separation at the temperatures closed to LCTS. Phase inversion processes for hydrogel containing 5 % of PEtOx at LCTS are accompanied by desorption of 32–73 % of sorbate. Moreover, thermoresponsive properties of the hydrogels filled with metallic silver wires are higher than that of the unfilled semi-IPNs.
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Markin, A. V., N. O. Yakimovich, L. A. Smirnova, and N. N. Smirnova. "Calorimetric study of organic-inorganic copolymers of ethylene glycol methacrylate and titanium dioxide." Polymer Science Series B 50, no. 5-6 (2008): 124–27. http://dx.doi.org/10.1134/s1560090408050059.

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Lai, Cheng-Yuan, Peter J. S. Foot, and John W. Brown. "Synthesis and Properties of Novel Polymers to Increase the Electrochromic Service Life of Poly(3-hexylthiophene)." Polymers and Polymer Composites 25, no. 2 (2017): 119–28. http://dx.doi.org/10.1177/096739111702500201.

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Poly(3-alkylthiophene)s (P3ATs) are a promising class of electrochromic materials because of their convenient processability and environmental stability. The adhesion of electroactive polymer coatings on a transparent conducting substrate is a significant factor affecting the durable colour-changing life of electrochromic devices such as visual displays and switchable windows. Traditional electrochromic coatings on transparent ITO glass electrodes often have poor cycling lifetimes, due to incompatibility between the polymers and the inorganic substrates. However, providing a covalently-bonded network between the active electrochromics and the ITO glass is an efficient method to increase the adhesion and hence to extend the service time; the research described here used Suzuki-Miyaura coupling of N-(3-trimethoxysilylpropyl)pyrrole (TMP) onto poly(3-hexylthiophene) (P3HT), as a precursor to a sol-gel reaction. The Si-O-metal network produced between the siloxane groups and metal oxide after the sol-gel reaction served to enhance the adhesion of the poly(3-hexylthiophene) onto ITO glass. With this stronger bonding, the colour-switching service time was found to be extended considerably by the observation of repeated electrochemical cycling tests. In addition, the electro-optic and electrochemical properties of copolymers with various molar substitution ratios of TMP on P3HT were investigated by cyclic voltammetry and UV-visible spectroscopy. The π-π* transition energy of P3HT increased with the degree of bromo-substitution, but diminished again after substituting with TMP. The hysteresis in electrochromic switching also became more noticeable with increased bromo-substitution on the P3HT, but it decreased when TMP was attached to the thiophene rings.
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Goñi-Ciaurriz, Leire, Marta Senosiain-Nicolay та Itziar Vélaz. "Aging Studies on Food Packaging Films Containing β-Cyclodextrin-Grafted TiO2 Nanoparticles". International Journal of Molecular Sciences 22, № 5 (2021): 2257. http://dx.doi.org/10.3390/ijms22052257.

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Polymeric materials, such as polyvinyl alcohol (PVA) and ethylene–PVA copolymers (EVOH) are widely used in the food sector as packaging materials because of their excellent properties. TiO2 nanoparticles (NPs) show photocatalytic activity; when added to the aforementioned polymers, on the one hand, they are expected to provide bactericidal capacity, whereas on the other hand, they could favor nanocomposite degradation. These types of nanoparticles can be derivatized with cyclodextrin macromolecules (CDs), which can act as food preservative carriers, increasing the packaging food protective properties. In this work, films containing β-Cyclodextrin (βCD)-grafted TiO2 nanoparticles and PVA or EVOH were prepared. Regarding the photocatalytic activity of the nanoparticles and the possible environmental protection, accelerated aging tests for PVA, EVOH, and their composites with cyclodextrin-grafted TiO2 nanoparticle (NP) films were performed by two methods, namely, stability chamber experiments at different conditions of temperature and relative humidity and UV light irradiation at different intensities. After analyzing the systems color changes (CIELAB) and Fourier transform infrared spectroscopy (FTIR) spectra, it was observed that the film degradation became more evident when increasing the temperature (25–80 °C) and relative humidity percentage (28–80%). There was no significant influence of the presence of CDs during the degradation process. When irradiating the films with UV light, the largest color variation was observed in the nanocomposite films, as expected. Moreover, the color change was more relevant with increasing NP percentages (1–5%) due to the high photocatalytic activity of TiO2. In addition, films were characterized by FTIR spectroscopy and variation in the signal intensities was observed, suggesting the increase of the material degradation in the presence of TiO2 NPs.
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Bergeron, Jean Yves, and Le H. Dao. "Electrical and physical properties of new electrically conducting quasi-composites. Poly(aniline-co-N-butylaniline) copolymers." Macromolecules 25, no. 13 (1992): 3332–37. http://dx.doi.org/10.1021/ma00039a002.

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Yan, Nina, Qingbao Guan, Zhiming Yang, et al. "Synthesis of Double-Shelled Hollow Inorganic Nanospheres through Block Copolymer-Metal Coordination and Atomic Layer Deposition." Polymers 11, no. 7 (2019): 1208. http://dx.doi.org/10.3390/polym11071208.

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Double-shelled hollow (DSH) structures with varied inorganic compositions are confirmed to have improved performances in diverse applications, especially in lithium ion battery. However, it is still of great challenge to obtain these complex nanostructures with traditional hard templates and solution-based route. Here we report an innovative pathway for the preparation of the DSH nanospheres based on block copolymer self-assembly, metal–ligand coordination and atomic layer deposition. Polymeric composite micelles derived from amphiphilic block copolymers and ferric ions were prepared with heating-enabled micellization and metal–ligand coordination. The DSH nanospheres with Fe2O3 stands inner and TiO2 outer the structures can be obtained with atomic layer deposition of a thin layer of TiO2 followed with calcination in air. The coordination was carried out at room temperature and the deposition was performed at the low temperature of 80 °C, thus providing a feasible fabrication strategy for DSH structures without destruction of the templates. The cavity and the outer layer of the structures can also be simply tuned with the utilized block copolymers and the deposition cycles. These DSH inorganic nanospheres are expected to find vital applications in battery, catalysis, sensing and drug delivery, etc.
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Savva, Ioanna, George Krekos, Alina Taculescu, Oana Marinica, Ladislau Vekas, and Theodora Krasia-Christoforou. "Fabrication and Characterization of Magnetoresponsive Electrospun Nanocomposite Membranes Based on Methacrylic Random Copolymers and Magnetite Nanoparticles." Journal of Nanomaterials 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/578026.

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Magnetoresponsive polymer-based fibrous nanocomposites belonging to the broad category of stimuli-responsive materials, is a relatively new class of “soft” composite materials, consisting of magnetic nanoparticles embedded within a polymeric fibrous matrix. The presence of an externally applied magnetic field influences the properties of these materials rendering them useful in numerous technological and biomedical applications including sensing, magnetic separation, catalysis and magnetic drug delivery. This study deals with the fabrication and characterization of magnetoresponsive nanocomposite fibrous membranes consisting of methacrylic random copolymers based on methyl methacrylate (MMA) and 2-(acetoacetoxy)ethyl methacrylate (AEMA) (MMA-co-AEMA) and oleic acid-coated magnetite (OA·Fe3O4) nanoparticles. The AEMA moieties containingβ-ketoester side-chain functionalities were introduced for the first time in this type of materials, because of their inherent ability to bind effectively onto inorganic surfaces providing an improved stabilization. For membrane fabrication the electrospinning technique was employed and a series of nanocomposite membranes was prepared in which the polymer content was kept constant and only the inorganic (OA·Fe3O4) content varied. Further to the characterization of these materials in regards to their morphology, composition and thermal properties, assessment of their magnetic characteristics disclosed tunable superparamagnetic behaviour at ambient temperature.
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Chiesa, Enrica, Rossella Dorati, Silvia Pisani, et al. "Graphene Nanoplatelets for the Development of Reinforced PLA–PCL Electrospun Fibers as the Next-Generation of Biomedical Mats." Polymers 12, no. 6 (2020): 1390. http://dx.doi.org/10.3390/polym12061390.

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Electrospun scaffolds made of nano- and micro-fibrous non-woven mats from biodegradable polymers have been intensely investigated in recent years. In this field, polymer-based materials are broadly used for biomedical applications since they can be managed in high scale, easily shaped, and chemically changed to tailor their specific biologic properties. Nonetheless polymeric materials can be reinforced with inorganic materials to produce a next-generation composite with improved properties. Herein, the role of graphene nanoplatelets (GNPs) on electrospun poly-l-lactide-co-poly-ε-caprolactone (PLA–PCL, 70:30 molar ratio) fibers was investigated. Microfibers of neat PLA–PCL and with different amounts of GNPs were produced by electrospinning and they were characterized for their physicochemical and biologic properties. Results showed that GNPs concentration notably affected the fibers morphology and diameters distribution, influenced PLA–PCL chain mobility in the crystallization process and tuned the mechanical and thermal properties of the electrospun matrices. GNPs were also liable of slowing down copolymer degradation rate in simulated physiological environment. However, no toxic impurities and degradation products were pointed out up to 60 d incubation. Furthermore, preliminary biologic tests proved the ability of the matrices to enhance fibroblast cells attachment and proliferation probably due to their unique 3D-interconnected structure.
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Kean Chong, Lim, Azlin Fazlina Osman, Asfa Amalia Ahmad Fauzi, Awad A. Alrashdi, and Khairul Anwar Abdul Halim. "The Mechanical and Thermal Properties of Poly(ethylene-co-vinyl acetate) (PECoVA) Composites with Pristine Dolomite and Organophilic Microcrystalline Dolomite (OMCD)." Polymers 13, no. 18 (2021): 3034. http://dx.doi.org/10.3390/polym13183034.

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Poly(ethylene-co-vinyl acetate) (PECoVA) composite containing organophilic microcrystalline dolomite (OMCD) was studied to replace the non-recyclable silicone elastomer in biomedical application. Pristine dolomite (DOL) is an inorganic mineral filler and is hydrophilic in nature, hence incompatible with most polymers and limits its use in biomedical applications. DOL was subjected to a combination of size reduction, tip sonication and a surface modification process to obtain a more effective dolomite filler, known as OMCD, as reinforcement material in the PECoVA copolymer matrix. The effects of DOL and OMCD loadings (1, 3, 5 wt%) on the structure and properties of the PECoVA composite were investigated. According to the X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), tensile and tear tests, dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC) analysis, the use of the OMCD filler brought a more pronounced positive impact to the PECoVA matrix as opposed to the DOL, where it enhanced the crystallinity of the matrix and led to much better matrix–filler interfacial interactions. Therefore, regardless of the filler loading, the PECoVA/OMCD composites demonstrate greater mechanical and thermal properties compared to the PECoVA/DOL composites. The best composite was produced with the OMCD loading of 3 wt%, in which the tensile strength (22.1 MPa), elongation at break (1413%) and Young’s modulus (2.0 MPa) of the copolymer matrix were increased by 44%, 23% and 21%, respectively. This proved that the combination of size reduction, tip sonication and the surface modification technique is efficient to obtain the PECoVA/dolomite composite with improved performance.
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Greil, Peter. "Templating Approaches Using Natural Cellular Plant Tissue." MRS Bulletin 35, no. 2 (2010): 145–49. http://dx.doi.org/10.1557/mrs2010.635.

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AbstractBiological preforms such as plant tissue offer a novel approach for manufacturing biomorphous ceramics with an anisotropic cellular micro- and macrostructure pseudomorphous to the natural template structure. Mimicking the hierarchical microstructure of the native template at different length scales from large vessels (mm) down to a cell wall microstructure (μm to nm) offers the possibility to tailor the local strut microstructure in biomorphous ceramics in order to improve mechanical properties at low density. Mineralization may be achieved by intercalation of the cell walls with an inorganic, metal organic, or organometallic sol. Heating above the pyrolysis temperature of the hydrocarbons forming the cell wall material in an inert atmosphere finally results in a positive replica of the cellular structure with a metal oxide/carbon composite forming the cell walls. Amorphous, nano- or microcrystalline C/Si-O-C(-N) composite materials are obtained by infiltration with a low viscosity preceramic polymeric precursor, such as polycarbosilane, -silazane, -siloxane, or a copolymer or mixture thereof. Pyrolysis into a biocarbon template and subsequent metal alloy melt or vapor infiltration and reaction at high temperatures above 1000°C is an alternate way to produce single and multiphase carbides and composites.
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Dissertations / Theses on the topic "Inorganic polymers. Copolymers. Polymeric composites"

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Chang, Kaiguo. "Synthesis and characterization of conducting polymer-inorganic composite materials /." View online ; access limited to URI, 2000. http://0-wwwlib.umi.com.helin.uri.edu/dissertations/dlnow/3108646.

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Hill, Melinda Lou. "Polymeric and Polymer/Inorganic Composite Membranes for Proton Exchange Membrane Fuel Cells." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/37597.

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Several types of novel proton exchange membranes which could be used for both direct methanol fuel cells (DMFCs) and hydrogen/air fuel cells were investigated in this work. One of the main challenges for DMFC membranes is high methanol crossover. Nafion, the current perfluorosulfonic acid copolymer benchmark membrane for both DMFCs and hydrogen/air fuel cells, shows very high methanol crossover. Directly copolymerized disulfonated poly(arylene ether sulfone)s copolymers doped with zirconium phosphates and phenyl phosphonates were synthesized and showed a significant reduction in methanol permeability. These copolymer/inorganic nanocomposite hybrid membranes show lower water uptake and conductivity than Nafion and neat poly(arylene ether sulfone)s copolymers, but in some cases have similar or even slightly improved DMFC performance due to the lower methanol permeability. These membranes also show advantages for high temperature applications because of the reinforcing effect of the filler, which helps to maintain the modulus of the membrane, allowing the membrane to maintain proton conductivity even above the hydrated glass transition temperature (Tg) of the copolymer. Sulfonated zirconium phenyl phosphonate additives were also synthesized, and membranes incorporating these materials and disulfonated poly(arylene ether sulfone)s showed promising proton conductivity over a wide range of relative humidities. Single-Tg polymer blend membranes were studied, which incorporated disulfonated poly(arylene ether sulfone) with varied amounts of polybenzimidazole. The polybenzimidazole served to decrease the water uptake and methanol permeability of the membranes, resulting in promising DMFC and hydrogen/air fuel cell performance.<br>Ph. D.
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Amici, Marco Gérard Jean-François Galy Jocelyne. "Hybrid Inorganic / Organic polymers based on methacrylate - polyhedral oligomeric silsesquioxanes (POSS®) morphology and structure - properties relationships /." Villeurbanne : Doc'INSA, 2006. http://docinsa.insa-lyon.fr/these/pont.php?id=amici.

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Thèse doctorat : Matériaux Polymères et Composites : Villeurbanne, INSA : 2006.<br>Thèse rédigée en anglais. Résumé étendu en français. Titre provenant de l'écran-titre. Bibliogr. p. 216-225. Index.
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Bayley, Gareth Michael. "Novel electrospun fibres of amphiphilic organic-inorganic graft copolymers of poly(acrylonitrile)-graftpoly( dimethylsiloxane) for silicone composite reinforcement." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17875.

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Thesis (PhD)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: Novel silicone nanocomposites were prepared using poly(acrylonitrile) (PAN) based reinforcing fibres as well as multi-walled carbon nanotubes (MWCNTs). Compatibility of the fibre fillers with the silicone matrix required the synthesis of novel amphiphilic, organic–inorganic graft copolymers of PAN and poly(dimethylsiloxane) (PAN-g-PDMS). These fibre precursor materials were synthesised via the “grafting through” technique using conventional free radical copolymerisation. The PDMS macromonomer content in the feed was varied from 5 wt% to 25 wt% and the molecular weights of the macromonomer were 1000 g.mol-1 and 5000 g.mol-1. The solvent medium of the precipitation reaction was optimised at a volume ratio of 98% benzene to 2% dimethylformamide (DMF). Successful incorporation of PDMS yielded graft copolymer blend materials of PAN-g-PDMS, blended with PAN homopolymer and unreacted PDMS macromonomer. A gradient elution profile was developed to track the successful removal of the PDMS macromonomer via hexane extraction. The gradient profile showed that as the PDMS content in the feed increased, the number of graft molecules in the blend increased relative to the number of PAN homopolymer molecules. The crystallisability of the PAN segments was shown to decrease as the PDMS content increased. The synthesised polymer was used as precursor material for the electrospinning of fibre fillers. The electrospinning of the precursor material was successfully achieved using 100% DMF as electrospinning solution medium. The amphiphilic nature of the precursor material in DMF resulted in self-assembled aggregate structures in the electrospinning solution. An increasing PDMS content was shown to affect the aggregation of the precursor material, and resulted in an increase in the solution viscosity. The “gel-like” solutions limited the achievable fibre morphological control when altering conventional electrospinning parameters such as voltage, tip-to-collector distance, and solution concentrations. The rapid evaporation and stretching of the solution during electrospinning, combined with the phase segregated amphiphilic molecules in solution and the crystallisation of the PAN segments resulted in (non-equilibrium morphology) fully porous fibres. The crystallinity was shown to decrease after electrospinning of the fibre precursor materials. Successful incorporation of surface oxidised MWCNTs into the electrospun fibres was achieved. The content of nanotubes was varied from 2 wt% to 32 wt%. The MWCNTs reduced the mean fibre diameters by acting as cross-linkers between the PAN segments and increasing the solution conductivity. The nanotubes dispersed well throughout the porous structure of the fibres and aligned in the direction of the fibre axis. Fabrication of silicone composites containing nonwoven and aligned fibre mats (with 8 wt% MWCNTs in the fibres, and without) was successfully achieved. The compatibilisation of the PDMS surface segregated domains allowed excellent dispersion and interaction of the PAN based fibre fillers with the silicone matrix. Mechanical analysis showed improved properties as the PDMS content in the fibre increased. The highest PDMS content fibres did, however, exhibit decreased properties. This was ascribed to increased PDMS (soft and weak) content, decreased crystallinity and increased fibre diameter (lower interfacial area). Dramatic improvements in strength, stiffness, strain and toughness were achieved. The most significant result was an increase in strain of 470%. The mechanical results correlated with results of SEM analysis of the fracture surfaces. The dramatic improvements in properties were a result of the fibre strength and ductility, as well as the mechanism of composite failure.<br>AFRIKAANSE OPSOMMING: Nuwe silikonnanosamestellings is berei deur gebruik te maak van poli(akrilonitriel) (PAN) gebaseerde versterkende vesels wat multi-ommuurde koolstof nanobuisies bevat het. Versoenbaarheid van die vesels met die silikonmatriks het die sintese van nuwe amfifiliese, organies–anorganiese ent-kopolimere van PAN en poli(dimetielsiloksaan) (PAN-g-PDMS) benodig. Die vesel voorlopermateriaal is deur middel van ‘n “ent-deur” vryeradikaalkopolimerisasie gesintetiseer. Die inhoud van die PDMS makromonomeer in die reaksie het gewissel vanaf 5% tot 25%. Die gebruik van twee verskillende molekulêre massas makromonomere is bestudeer (1000 en 5000 g.mol-1). Die optimale oplosmiddelmengsel vir die neerslagreaksie was 'n volume verhouding van 98% benseen tot 2% dimetielformamied (DMF). Suksesvolle insluiting van PDMS het versnitmateriale van PAN-g-PDMS kopolimere gemeng met PAN homopolimere en ongereageerde PDMS makromonomere gelewer. 'n Gradiënteluering- chromatografiese profiel is ontwikkel om die suksesvolle verwydering van die PDMS makromonomere via heksaanekstraksie te bepaal. Die gradiëntprofiel het aangetoon dat indien die PDMS inhoud in die reagense verhoog is, die aantal entmolekules relatief tot PAN homopolimeermolekules ook verhoog het. 'n Toename in PDMS inhoud het egter 'n afname in kristallisasie van die PAN segmente tot gevolg gehad. Die gesintetiseerde polimeer is gebruik as die beginmateriaal vir die elektrospin van veselvullers. Die elektrospin van die beginmateriaal was suksesvol wanneer 100% DMF as elektrospinoplosmiddel gebruik is. Die amfifiliese aard van die beginmateriaal in DMF lei tot outokonstruksie van aggregaatstrukture in die elektrospinoplossing. Toenemende PDMS inhoud beïnvloed die outokonstruksie van die molekules in oplossing en het gelei tot 'n toename in die oplossings se viskositeit. Die "gelagtige" oplossings beperk die haalbare vesel se morfologiese beheerbaarheid wanneer konvensionele elektrospin parameters soos elektriese spanning, punt-tot-versamelaar afstand, en oplossingkonsentrasies gewysig word. Die vinnige verdamping en strek van die oplossing tydens elektrospin, gekombineer met die fase-geskeide amfifiliese molekules in oplossing en die kristallisasie van die PAN segmente, het gelei tot (nie-ewewig morfologie) volledige poreuse vesels. Die kristalliniteit van die veselbeginmaterial het afgeneem nadat elektrospin toegepas is. Die insluiting van die oppervlak-geoksideerde multi-ommuurde koolstof nanobuisies in die elektrogespinde vesels was suksesvol. Die inhoud van die nanobuisies het gewissel van 2 wt% tot 32 wt%. Die MWCNTs het die gemiddelde veseldeursnit verminder deur op te tree as kruisbinders tussen die PAN segmente van die molekules. Die nanobuisies was goed versprei deur die poreuse struktuur van die vesels en dit was gerig in die rigting van die vesel-as. Bereiding van die silikonsamestellings bestaande uit nie-geweefde en gerigte veseloppervlakke (met en sonder 8 wt% multi-ommuurde koolstof nanobuisies in die vesel) was suksesvol. Die versoenbaarheid tussen die oppervlak van die PDMS-geskeide gebiede en die silikonmatriks laat uitstekende verspreiding en interaksie van die PAN-gebaseerde veselvullers met die silikonmatriks toe. Meganiese analise het aangetoon dat die fisiese eienskappe verbeter het namate die PDMS inhoud in die vesel vermeerder het. Die vesels met die hoogste PDMS inhoud het egter verswakte eienskappe getoon. Dit is toegeskryf aan ‘n verhoogde PDMS inhoud (sag en swak), ‘n afname in kristalliniteit en ‘n verhoogde veseldeursnit (laer grensoppervlakke). Dramatiese verbeterings in sterkte, styfheid, verlengbaarheid, vervorming en taaiheid is bereik. Die mees betekenisvolle gevolg was 'n toename in die verrekking van 470%. Die meganiese resultate is gekorreleer met SEM ontleding van die brekingsoppervlakke. Die veselkrag en vervormbaarheid, sowel as die meganisme van die splyting van die samestellings, het tot die dramatiese verbeterings in die meganiese eienskappe gelei.
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Bhaway, Sarang M. "Fabrication of Block Copolymer Templated Mesoporous Metal Oxide Composites for Energy Storage Applications." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1468417723.

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Amici, Marco. "Hybrid Inorganic / Organic polymers based on methacrylate - polyhedral oligomeric silsesquioxanes (POSS®) : morphology and structure - properties relationships." Lyon, INSA, 2006. http://theses.insa-lyon.fr/publication/2006ISAL0004/these.pdf.

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De nouveaux systèmes organiques/inorganiques basés sur des méthacrylates et des polysilsesquioxanes polyédriques (POSS®) ont été synthétisés et caractérisés. La synthèse a été faite par polymérisation radicalaire thermique ou UV. La caractérisation thermique a été faite par RMN, PIR et GPC. Les POSS sont polymérisables avec des monomères organiques après avoir obtenue une bonne dispersion. Les structures et les morphologies, caractérisées par MEB, MET et WAXS, dépendent principalement de la dispersion des POSS dans la matrice organique. En fonction du type de POSS et de leur concentration, on peut avoir plusieurs structures-morphologies qui ont une influence très forte sur les propriétés des systèmes. Les propriétés thermiques, mécaniques et thermomécaniques ont été étudiées. Les POSS changent la densité moyenne de réticulation, quand, dans les systèmes linéaires, les propriétés des systèmes hybrides ont été influencées par la nature des groupes organiques des POSS<br>Novel hybrid inorganic/organic systems based on methacrylate and polyhedral oligomeric silsesquioxanes (POSS ®) have been synthesised and characterised. The synthesis has been performed via either thermally or UV free-radical polymerization. Chemical characterisation has been done with NMR, NIR and SEC. The POSS have been found to be polymerizable with the organic monomers once a good dispersion is ensured. Structure and morphology, characterised by means of SEM, TEM, AFM and WAXS, have been shown to be mainly dependent on the dispersion of the POSS in the organic matrix. Depending on the POSS grade and concentration, one could obtain a wide array of structure-morphologies, from micro-aggregates to a very fine dispersion, probably to the molecular level. In turn, these different morphologies have an influence on the properties of the final systems. Thermal, thermomechanical and mechanical properties have been analysed. The POSS have been shown to change the crosslinking density of the thermosetting networks, while, in thermoplastic systems, the properties of the hybrid systems have been largely influenced by the nature of the organic ligands borne by the POSS
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Li, Haiying. "A study on grafting poly(p-phenylene terephthalamide) with aliphatic amines and amides." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/8594.

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Deng, Yuanming. "Study on RAFT polymerization and nano-structured hybrid system of POSS macromers." Phd thesis, INSA de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00770668.

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This work is generally aimed to synthesize POSS based BCPs via RAFT polymerization, to study their self-assembly behaviors, to research on the effect of POSS self-assembly structure on the bulk properties and to prepare nanostructured hybrid epoxy via self-assembly of POSS based copolymer. In Chapter1, We studied the RAFT polymerization of POSS macromers and capable to synthesize well defined POSS based BCPs with high POSS fraction and different topology such as AB，BAB and (BA)3. The vertex group and the morphology effect on thermo-mechanical properties of POSS based BCPs as well as the structure-property relationship was investigated. Dispersion RAFT polymerization in apolar solvent was applied and various aggregates with different morphology in Chapter2. Cooling induced reversible micelle formation and transition was found and the pathway selection in vesicle formation was investigated. Nano-construction of O/I hybrid epoxy materials based on POSS based copolymers was investigated in Chapter4. The effect of functional group content on miscibility of POSS based statistic copolymer and epoxy was investigated. A novel method to nanostructure epoxy hybrid involving self-assembly of POSS based BCPs in epoxy was presented. High homogeneity and well size/morphology control of core-corona structure containing rigid POSS core and soluble PMMA corona in networks were obtained.
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9

Patel, Reena R. "Molecular dynamics simulations of polymer nanocomposites containing polyhedral oligomeric silsesquioxanes." MSSTATE, 2004. http://sun.library.msstate.edu/ETD-db/theses/available/etd-04082004-135524/.

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Molecular dynamics simulations were carried out on traditional polymers copolymerized with POSS (Polyhedral Oligomeric Silsesquioxanes) derivatives to identify the reason behind improved properties imparted to the conventional polymers with the chemical incorporation of POSS. Two classes of systems are used in the present study, namely the polystyrene and polymethyl methacrylate systems. Seven systems are studied in the polystyrene class. The effect of corner substituent groups of the POSS cage on the properties of the polymer nanocomposites was studied using the polystyrene. In addition, the effect of the type of cage structure on the properties was studied using T8, T10 and T12 POSS cage structures containing phenyl substituents on each POSS cage. Systems with polymethyl methacrylate were studied to analyze the effect of mole percent of POSS on the polymer properties, holding the corner substituents on the POSS unit constant. The corner function used was the isobutyl group. The properties analyzed using simulations include glass transition temperature, volumetric thermal expansion coefficient, X-ray scattering data, solubility parameter and mechanical properties. In both polystyrene and polymethyl methacrylate systems, simulations were also carried out on the pure parent polymers for the sake of comparison. The effect of forcefield on the predicted properties was studied using both COMPASS and PCFF forcefields. Performance analysis of the code used in the present simulation was done by analyzing the parallel run time of simulations involving pure atactic polystyrene.
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10

Peng, Zhen. "Structuration de nanocomposites à partir de copolymères à blocs : expérience et modélisation." Thesis, Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0015.

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Les copolymères à blocs sont des matériaux très intéressants en raison de leur capacité à s’auto-organiser pour former des domaines de quelques dizaines de nanomètres. Cette organisation peut être mise à profit pour obtenir des matériaux hybrides organiques/inorganiques dans lesquels la phase inorganique peut être structurée dans un des domaines plutôt que répartie de façon aléatoire. Ceci peut conférer des propriétés particulières aux copolymères hybrides. Notre travail de thèse s’inscrit dans cette problématique. Des copolymères à blocs ont été modifiés soit par greffage en solution de molécules organiques/inorganiques du type POSS réactif (polyhedral oligomeric silsesquioxane), soit par mélange en solution ou à l’état fondu de POSS non réactif. Les copolymères triblocs considérés sont du type SBS (styrène-butadiène-styrène) et SEBS-g-MA (styrène-éthylène-butène-styrène greffé anhydride maléique). L’ensemble de ces copolymères a été caractérisé expérimentalement afin de déterminer leur morphologie et leur comportement thermo-mécanique. En parallèle une approche théorique a été proposée, basée sur la modélisation moléculaire de ces copolymères à l’échelle mésoscale. La méthode sélectionnée ‘Dissipative Particle Dynamics’ a permis de modéliser la morphologie de nos copolymères avec succès ainsi que celle de nos matériaux hybrides modifiés par les POSS. Ces derniers peuvent être dispersés à l’échelle moléculaire ou au contraire former des agrégats, selon le procédé de mise en œuvre et la structure chimique des POSS<br>Experimental approaches and a modeling method have been carried out in parallele. The simulation method was used firstly to confirm the experimental results, and then will be applied to more complex nanocomposites. A series of hybrid systems based on triblock copolymer of polystyrene-butadiene-polystyrene (SBS) grafted with polyhedral oligomeric silsesquioxane(POSS) molecules with a dimethylsiloxy group (DMIPOSS) were synthesized by a hydrosilation method. The characteristics on incorporation of an unreactive POSS with constituent cyclohexyl (CyPOSS) in SBS matrix have been compared with above systems. The nanocomposites obtained were analyzed by atomic force microscopy, Transmission electron microscopy, X-ray scattering and dynamic mechanical.The same strategy has been carried out on polystyrene-b-poly (ethylene-co-butylene)-b-polystyrene-g-maleic anhydride (SEBS-g-MA) with other type of POSS. Dynamic particles dissipative (DPD) simulation methods in Materials Studio (Accelrys) were employed to study morphology of SB, SBS, SEBS and hybrid system. In this mesoscopic method, the polymer is simplified as a series of connecting beads which contains one or more monomer units. And all monomer units interact with each other following Newtonian Equations of Motion
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Books on the topic "Inorganic polymers. Copolymers. Polymeric composites"

1

Shirō, Kobayashi, and SpringerLink (Online service), eds. Polymer Materials: Block-Copolymers, Nanocomposites, Organic/Inorganic Hybrids, Polymethylenes. Springer Berlin Heidelberg, 2010.

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Synthetic metal-containing polymers. Wiley-VCH, 2004.

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Sirotkin, O. S. Neorganicheskie polimernye veshchestva i materialy: Bezuglerodnye makromolekuly i polimery. Kazanskiĭ gos. ėnergeticheskiĭ universitet, 2002.

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Saini, Parveen. Fundamentals of Conjugated Polymer Blends, Copolymers and Composites: Synthesis, Properties, and Applications. Wiley & Sons, Incorporated, John, 2015.

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Saini, Parveen. Fundamentals of Conjugated Polymer Blends, Copolymers and Composites: Synthesis, Properties, and Applications. Wiley & Sons, Incorporated, John, 2015.

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Kalia, Susheel, B. S. Kaith, Sanjay K. Nayak, and Smita Mohanty. Polymer Nanocomposites Based on Inorganic and Organic Nanomaterials. Wiley & Sons, Incorporated, John, 2015.

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Kalia, Susheel, B. S. Kaith, Sanjay K. Nayak, and Smita Mohanty. Polymer Nanocomposites Based on Inorganic and Organic Nanomaterials. Wiley & Sons, Incorporated, John, 2015.

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Mittal, Vikas. Characterization Techniques for Polymer Nanocomposites. Wiley & Sons, Incorporated, John, 2012.

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Mittal, Vikas. Characterization Techniques for Polymer Nanocomposites. Wiley-VCH Verlag GmbH, 2012.

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Mittal, Vikas. Characterization Techniques for Polymer Nanocomposites. Wiley & Sons, Incorporated, John, 2012.

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Book chapters on the topic "Inorganic polymers. Copolymers. Polymeric composites"

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Liu, Peng. "Polypyrrole/Inorganic Nanocomposites for Supercapacitors." In Fundamentals of Conjugated Polymer Blends, Copolymers and Composites. John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119137160.ch8.

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Gao, Qingsheng, Lichun Yang, and Ning Liu. "Conjugated-Polymer/Inorganic Nanocomposites as Electrode Materials for Li-Ion Batteries." In Fundamentals of Conjugated Polymer Blends, Copolymers and Composites. John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119137160.ch7.

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Tenneti, Kishore K., Xiaofang Chen, Qiwei Pan, and Christopher Y. Li. "Structure and Assembly of Liquid Crystalline Block Copolymers." In Polymers and Polymeric Composites: A Reference Series. Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-642-37179-0_64-1.

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Tenneti, Kishore K., Xiaofang Chen, Qiwei Pan, and Christopher Y. Li. "Structure and Assembly of Liquid Crystalline Block Copolymers." In Polymers and Polymeric Composites: A Reference Series. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-43350-5_64.

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Mobin, Rizwana, Tauseef Ahmad Rangreez, Hamida Tun Nisa Chisti, Inamuddin, and Mashallah Rezakazemi. "Organic-Inorganic Hybrid Materials and Their Applications." In Polymers and Polymeric Composites: A Reference Series. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92067-2_33-1.

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Mobin, Rizwana, Tauseef Ahmad Rangreez, Hamida Tun Nisa Chisti, Inamuddin, and Mashallah Rezakazemi. "Organic-Inorganic Hybrid Materials and Their Applications." In Polymers and Polymeric Composites: A Reference Series. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-95987-0_33.

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Joshi, R. R., J. R. Dharia, and S. K. Gupta. "Organotin Antifouling Polymers: Synthesis and Properties of New Copolymers with Pendent Organotin Moities." In Inorganic and Metal-Containing Polymeric Materials. Springer US, 1990. http://dx.doi.org/10.1007/978-1-4613-0669-6_23.

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"Specific Features of Novel Blends on the Basis of Copolymers." In Polymers and Polymeric Composites. Apple Academic Press, 2014. http://dx.doi.org/10.1201/b17861-11.

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Mark, James E., Harry R. Allcock, and Robert West. "Inorganic-Organic Hybrid Composites." In Inorganic Polymers. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195131192.003.0012.

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A relatively new area that involves silicon-containing materials is the synthesis of “ultrastructure” materials, that is materials in which structure can be controlled at the level of around 100 Å. An example of such a synthesis is the “sol-gel” hydrolysis of alkoxysilanes (organosilicates) to give silica, SiO2. The reaction is complicated, involving polymerization and branching, but a typical overall reaction may be written . . . Si(OR)4 + 2H2O → SiO2 + 4ROH (1) . . . where the Si(OR)4 organometallic species is typically tetraethoxysilane (tetraethylorthosilicate) (TEOS, with R being C2H5). In this application, the precursor compound is hydrolyzed and then condensed to polymeric chains, the chains become more and more branched, and finally a continuous highly swollen gel is formed. It is first dried at moderately low temperatures to remove volatile species, and then is fired into a porous ceramic object. It can then be densified, if desired, and machined into a final ceramic part. Not surprisingly, the production of ceramics by this novel route has generated a great deal of interest. Its advantages, over the usual “heat-and-beat” (e.g., sintering) approach to ceramics, is (i) the higher purity of the starting materials, (ii) the relatively low temperatures required, (iii) the possibility of controlling the ultrastructure of the ceramic (to reduce the number of microscopic flaws that lead to brittleness), (iv) the ease with which ceramic coatings can be formed, and (v) the ease with which ceramic alloys can be prepared (for example, by hydrolyzing solutions of both silicates and titanates). This approach has been used to form ceramic-like phases in a wide variety of polymers. The one which has been studied the most in this regard is poly(dimethylsiloxane) (PDMS), the semi-inorganic polymer featured extensively in Chapter 4. This is due to PDMS being in the class of relatively weak elastomers most in need of reinforcement, and being capable of easily absorbing the precursor materials generally used in the sol-gel process. The same hydrolyses can be carried out within a polymeric matrix to generate particles of the ceramic material, typically with an average diameter of a few hundred angstroms. The polymer typically has end groups, such as hydroxyls, that can participate in the hydrolysis-condensation reactions.
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Han, Chang Dae. "Rheology of Particulate-Filled Polymers, Nanocomposites, and Fiber-Reinforced Thermoplastic Composites." In Rheology and Processing of Polymeric Materials: Volume 1: Polymer Rheology. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780195187823.003.0018.

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Polymer composites consisting of a thermoplastic polymer forming the matrix phase and a large amount of inorganic particles (commonly referred to as fillers) or glass fibers, which are often referred to as particulate-filled polymers, are very common in the plastics and elastomer’s industries (Deanin and Schott 1974; Kraus 1965; Lubin 1969). Polymer composites are developed to achieve a set of properties not possessed by the thermoplastic polymer (i.e., polymeric matrix) alone. Polymeric matrices can be thermoplastics, which soften and behave as viscous liquids when heated to above their glass transition temperatures (in the case of amorphous thermoplastic polymers) or above their melting temperatures (in the case of semicrystalline thermoplastic polymers). Polymeric matrices can also be thermosets, which undergo a transformation from a viscous resinous liquid to a hard or rubbery solid in the presence of heat and/or curing agents. There are numerous industrial products made of particulate-filled polymeric materials; for example, thermoplastic polymers filled with mica or calcium carbonate, carbon-black-filled elastomers, thermoplastic polymers or thermosets reinforced with glass fibers or carbon fibers. The ultimate goal of adding fillers to a thermoplastic polymer and adding glass fiber or carbon fiber to a thermoset is to improve the mechanical properties of the polymer. However, fillers, glass fibers, or carbon fibers themselves usually supply little or no reinforcement since there is little interfacial interaction between a thermoplastic polymer and fillers, and between a thermoset and glass fiber or carbon fiber. This has led to the development of “coupling agents,” chemical additives capable of improving the interfacial bonds between a thermoplastic polymer and fillers, and between a thermoset and glass fibers or carbon fibers (Plueddemann 1982). The use of coupling agents for the surface modification of fillers to reinforce thermoplastics has generally been directed towards improving the mechanical strength and chemical resistance of composites by improving adhesion across the interface. When inorganic fillers or glass fibers are added to a thermoplastic polymer, the resulting material exhibits a complex rheological behavior, quite different from the rheology of neat homopolymers presented in Chapter 6.
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Conference papers on the topic "Inorganic polymers. Copolymers. Polymeric composites"

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Ascione, L., V. Ambrogi, S. Battiato, et al. "Synthesis and Characterization of Linear Hyperbranched PBA Block Copolymers, as Potential Polymeric Plasticizers." In V INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS (TOP) AND COMPOSITES. AIP, 2010. http://dx.doi.org/10.1063/1.3455636.

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