Anelastic and Dielectric Effects in Polymeric Solids |
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Page 143
... loss peak associated with the crystalline regions often observed some 50 to 100 ° c below the melting point . An example in the latter category is the well - known a peak in polyethylene which occurs at about 50 ° c at 1 c / s ( Chapter ...
... loss peak associated with the crystalline regions often observed some 50 to 100 ° c below the melting point . An example in the latter category is the well - known a peak in polyethylene which occurs at about 50 ° c at 1 c / s ( Chapter ...
Page 268
... loss peak , and at higher temperatures the a and ẞ peaks merge and become indistinguishable . For PnBMA , PiBMA and PnNMA single asymmetric loss peaks were found at all temperatures . These were inferred to be predominantly x peaks con ...
... loss peak , and at higher temperatures the a and ẞ peaks merge and become indistinguishable . For PnBMA , PiBMA and PnNMA single asymmetric loss peaks were found at all temperatures . These were inferred to be predominantly x peaks con ...
Page 519
... loss peak occurred at -115 ° c , and a definite shoulder was observed at -70 ° c . Farrow , McIntosh and Ward suggested that the ẞ region contained two super- posed loss processes , and correlated their results with the n.m.r. study of ...
... loss peak occurred at -115 ° c , and a definite shoulder was observed at -70 ° c . Farrow , McIntosh and Ward suggested that the ẞ region contained two super- posed loss processes , and correlated their results with the n.m.r. study of ...
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Anelastic and Dielectric Effects in Polymeric Solids N. G. McCrum,Bryan Eric Read,Graham Williams (Ph.D.) No preview available - 1967 |
Common terms and phrases
acrylate activation energy amorphous polymers amorphous regions annealing atactic atoms bonds Chem copolymers crosslinked crystal crystalline crystalline polymers curves decrease degree of crystallinity density dielectric constant dielectric loss dielectric relaxation dipole distribution dyn/cm² Equation experimental Ferry glass transition glass-rubber relaxation Heijboer Illers Illers and Breuer increasing Ishida isotactic kcal/mole Log f c/s loss peak loss tangent magnitude main chain maxima maximum loss McCrum measurements mechanical relaxation methacrylate polymers methyl Mikhailov molecular weight molecules motions observed obtained occurs Phys plasticizer plots PMMA polyamides polydian carbonate polyethylene polymer chain Polymer Sci polymerization polymethyl methacrylate polypropylene polystyrene polyvinyl acetate PVAc PVOH relaxation region repeat unit rotation rubber Saito sample Schmieder and Wolf shear modulus shown in Figure side-group single relaxation specimen spherulites ẞ peak ẞ process ẞ relaxation stereoregularity stress relaxation studied syndiotactic Takayanagi Temperature dependence theory tion Yamafuji