Relaxation in PolymersM. Pietralla, W. Pechhold |
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Page 197
... thermal expansion coefficient ? ROZENBERG : I fully agree with your suggestion . The density gradient in amorphous polymers must lead to the gradient of thermal expansion coefficient . Unfortunately , we have not yet mea- sured the ...
... thermal expansion coefficient ? ROZENBERG : I fully agree with your suggestion . The density gradient in amorphous polymers must lead to the gradient of thermal expansion coefficient . Unfortunately , we have not yet mea- sured the ...
Page 229
... thermal expansion coefficients are correspondingly equal to 1.21.10- and 2.9.10-4K - 1 below and above this temperature . Both values of the coefficient are close to those usual- ly observed for most polymers in glass and rubbery states ...
... thermal expansion coefficients are correspondingly equal to 1.21.10- and 2.9.10-4K - 1 below and above this temperature . Both values of the coefficient are close to those usual- ly observed for most polymers in glass and rubbery states ...
Page 240
... thermal cleaning [ 16 ] , partial heating [ 16 ] , and thermal sampling [ 17 , 18 ] . We will demonstrate these facts on the TSD- and ac- spectrum of PPQ . Because this polymer is amor- phous , its TSD - spectrum cannot be influenced by ...
... thermal cleaning [ 16 ] , partial heating [ 16 ] , and thermal sampling [ 17 , 18 ] . We will demonstrate these facts on the TSD- and ac- spectrum of PPQ . Because this polymer is amor- phous , its TSD - spectrum cannot be influenced by ...
Contents
Preface | 13 |
Dispersive and nondispersive transport processes in polymers | 45 |
Neutron spinecho investigations on the dynamics of polymer systems | 63 |
Copyright | |
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Common terms and phrases
amorphous annealing behavior calculated changes charge carrier Chem Phys coefficient component concentration copolymer correlation function crosslinked crystalline crystallization curves dangling chains defects deformation density diacetylene dielectric dielectric relaxation diffusion dipole distribution dynamic elastic energy equation equilibrium experimental experiments factor film fluctuations free volume frequency glass transition glass transition temperature glassy polymers heating increase intensity interaction layer length linear Macromolecules measured mechanism melt mesomorphic mesophase mobility modes modulus molecular mass molecular weight molecules monomer motion neutron observed obtained orientation parameter PDES peak perature phase phonon Phys Rev plastic polarization polybutadiene Polym Sci polymer polymer chains polymeric properties PTTF PVDF radicals range region relaxation processes Rouse sample scale scattering segment shear shown in Fig spatial light modulator spectra spectrum spherulite structure T₁ temperature dependence theory thermal thermodynamic tion tube ture values viscoelastic viscosity