Journal of Polymer Science, Part B: Polymer Physics
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Effect of flocculated structure on rheology of poly(butylene terephthalate)/clay nanocompositesAbstract The microstructure and rheological property of poly(butylene terephthalate) (PBT)/epoxy/montmorillonite nanocomposites (PCNs) were investigated. For the study, PCNs were prepared by melt intercalation in clay content of 4 wt % and, epoxy loadings were varied from 2 to 4 wt %. The intercalated PCNs are characterized by different techniques such as transmissi... ...
Journal of Polymer Science, Part B: Polymer Physics - Tập 43 Số 19 - Trang 2807-2818 - 2005
FTIR analysis of hydrogen bonding in amorphous linear aromatic polyurethanes. II. Influence of styrene solventAbstract Fourier‐transform infrared (FTIR) spectral studies were carried out on a polyurethane in styrene solutions at styrene concentrations from 30 to 90% (w/w). NH vibrations were studied in the stretching and bending regions. The results demonstrated that the NH groups of the polyurethane can hydrogen bond not only with the CO groups but also with other group... ...
Journal of Polymer Science, Part B: Polymer Physics - Tập 32 Số 8 - Trang 1315-1320 - 1994
Effect of acidification treatment and morphological stability of sulfonated poly(arylene ether sulfone) copolymer proton‐exchange membranes for fuel‐cell use above 100 °CAbstract Directly copolymerized wholly aromatic sulfonated poly(arylene ether sulfone) copolymers derived from 4,4′‐biphenol, 4,4′‐dichlorodiphenyl sulfone, 3,3′‐disulfonated, and 4,4′‐dichlorodiphenyl sulfone (BPSH) were evaluated as proton‐exchange membranes for elevated temperature operation (100–140 °C). Acidification of the copolymer from the sulfonated form af... ...
Journal of Polymer Science, Part B: Polymer Physics - Tập 41 Số 22 - Trang 2816-2828 - 2003
Molecular design of functional polymer surfacesAbstract Three design principles are presented that allow for the molecular design of functional polymer surfaces: surface segregation, surface structure, and surface reorganization. These design principles are illustrated by a description of the behavior of model end‐functional polymers that accurately reflect the general behavior of essentially all possible linear... ...
Journal of Polymer Science, Part B: Polymer Physics - Tập 42 Số 16 - Trang 2942-2956 - 2004
Surface energetics, dispersion, and nanotribomechanical behavior of POSS/PP hybrid nanocompositesAbstract Hybrid organic–inorganic polymer nanocomposites incorporating polyhedral oligomeric silsesquioxane (POSS) nanoparticles are of increasing interest for high performance materials applications. Octaisobutyl POSS/polypropylene nanocomposites were prepared at varying POSS concentrations via melt blending. The interplay of POSS molecular geometry, composition, a... ...
Journal of Polymer Science, Part B: Polymer Physics - Tập 45 Số 17 - Trang 2441-2455 - 2007
Crystallization behavior and morphological development of isotactic polypropylene blended with nanostructured polyhedral oligomeric silsesquioxane moleculesAbstract The thermal properties and morphological development of isothermally crystallized isotactic polypropylene (iPP) blended with nanostructured polyhedral oligomeric silsesquioxane (POSS) molecules at very small loading of POSS were studied with differential scanning calorimeter (DSC), thermal gravimetric analysis, dynamic mechanical analysis, polarized optical... ...
Journal of Polymer Science, Part B: Polymer Physics - Tập 44 Số 15 - Trang 2122-2134 - 2006
Viscoelastic properties and residual stresses in polyhedral oligomeric silsesquioxane‐reinforced epoxy matricesAbstract Fiber‐filled thermosetting polymer composites are extensively used in aerospace industries. One disadvantage of these materials is cure induced or thermally induced residual stresses in the matrix, which may result in deteriorated performance and premature failure. This article explores the use of epoxy/multifunctional polyhedral oligomeric silsesquioxane (... ...
Journal of Polymer Science, Part B: Polymer Physics - Tập 46 Số 24 - Trang 2719-2732 - 2008
Correlation of Activation Energies of Gas Diffusivity and Local Matrix Mobility in Polycarbonate/POSS NanocompositesABSTRACT According to basic phenomenological models describing the solution‐diffusion based mechanism of penetrant diffusion in dense polymers, a connection between the diffusive transport of gas molecules in a polymeric matrix and the molecular mobility of that matrix on a certain length scale is, in principle, established for a long time. However, experimental dat... ...
Journal of Polymer Science, Part B: Polymer Physics - Tập 51 Số 22 - Trang 1593-1597 - 2013
The influence of solid‐state microstructure on the origin and yield of long‐lived photogenerated charge in neat semiconducting polymersAbstract The influence of solid‐state microstructure on the optoelectronic properties of conjugated polymers is widely recognized, but still poorly understood. Here, we show how the microstructure of conjugated polymers controls the yield and decay dynamics of long‐lived photogenerated charge in neat films. Poly(3‐hexylthiophene) was used as a model system. By varyi... ...
Journal of Polymer Science, Part B: Polymer Physics - Tập 50 Số 1 - Trang 27-37 - 2012
Structure and morphology control in thin films of regioregular poly(3‐hexylthiophene)Abstract This review focuses on the structural control in thin films of regioregular poly(3‐hexylthiophene) (P3HT), a workhorse among conjugated semiconducting polymers. It highlights the correlation existing between processing conditions and the resulting structures formed in thin films and in solution. Particular emphasis is put on the control of nucleation, cryst... ...
Journal of Polymer Science, Part B: Polymer Physics - Tập 49 Số 17 - Trang 1218-1233 - 2011
Tổng số: 147
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