Anelastic and Dielectric Effects in Polymeric Solids |
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Page 240
... PMMA . The relaxation properties of conventional PMMA will be discussed in Sections 8.2a to 8.2f and the stereoregular polymers will be considered in Section 8.2g . 8.2a The α and ẞ Relaxations - Mechanical The first significant study ...
... PMMA . The relaxation properties of conventional PMMA will be discussed in Sections 8.2a to 8.2f and the stereoregular polymers will be considered in Section 8.2g . 8.2a The α and ẞ Relaxations - Mechanical The first significant study ...
Page 254
... PMMA G ' ( N / m2 ) 106 -200 109 108 -100 O 100 200 7100 10-1 10-2 10 Tan do Temperature ( ° c ) Figure 8.12 . Temperature dependence of G ' and tan 8 , at 1 c / s for conventional and 95 % isotactic PMMA ( Heijboer , 1965 ) . E 200 c ...
... PMMA G ' ( N / m2 ) 106 -200 109 108 -100 O 100 200 7100 10-1 10-2 10 Tan do Temperature ( ° c ) Figure 8.12 . Temperature dependence of G ' and tan 8 , at 1 c / s for conventional and 95 % isotactic PMMA ( Heijboer , 1965 ) . E 200 c ...
Page 292
N. G. McCrum, Bryan Eric Read, Graham Williams. PMMA . Further , from a study of copolymers of methyl methacrylate and methyl acrylate , Heijboer ( 1956 ) observed that the mechanical ẞ peak of PMMA gradually disappeared as the ...
N. G. McCrum, Bryan Eric Read, Graham Williams. PMMA . Further , from a study of copolymers of methyl methacrylate and methyl acrylate , Heijboer ( 1956 ) observed that the mechanical ẞ peak of PMMA gradually disappeared as the ...
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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