Relaxation in PolymersM. Pietralla, W. Pechhold |
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Page 165
... phonon density of states may be obtained rela- tively easily from the inelastic incoherent scattering inten- sity . en ( Io ) 0 -0.5 -0.5 37 98 118 -0.5 148 161 -0.5 - 1 . - 2 . - 3 . PB IN 13 -4 . 186 201 230 10 20 2 [ 8-2 ] 30 Fig . 1 ...
... phonon density of states may be obtained rela- tively easily from the inelastic incoherent scattering inten- sity . en ( Io ) 0 -0.5 -0.5 37 98 118 -0.5 148 161 -0.5 - 1 . - 2 . - 3 . PB IN 13 -4 . 186 201 230 10 20 2 [ 8-2 ] 30 Fig . 1 ...
Page 168
... phonons and the elastic line . If the phonon density of states is the same at all temperatures the phonon part should fall on a common curve - about = 0.365 Å1 , which corresponds to a cor- relation length of = 4π / г ~ 34 Å ( i.e. ...
... phonons and the elastic line . If the phonon density of states is the same at all temperatures the phonon part should fall on a common curve - about = 0.365 Å1 , which corresponds to a cor- relation length of = 4π / г ~ 34 Å ( i.e. ...
Page 202
... phonon contribution is added to obtain the measured spec- tra Fig . 5b . Brillouin shift fg ( 0 ) and linewidth П ( △ ) for chlophen as a function of temperature . The solid and dashed lines are results of a fit of the Lin - Wang ...
... phonon contribution is added to obtain the measured spec- tra Fig . 5b . Brillouin shift fg ( 0 ) and linewidth П ( △ ) for chlophen as a function of temperature . The solid and dashed lines are results of a fit of the Lin - Wang ...
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