Relaxation in PolymersM. Pietralla, W. Pechhold |
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Page 57
... Rouse parameters obtained from the two measurements coincide ( self - correlation : Wo * = 1.75 + 0.15 × 1013 Å1s 1 ; pair - correlation : Wo = 1.85 + 0.05x1013 Å4s - 1 ) . The segmental friction coeffi- cient / 2 8.9 ± 0.7 × 105 dynes ...
... Rouse parameters obtained from the two measurements coincide ( self - correlation : Wo * = 1.75 + 0.15 × 1013 Å1s 1 ; pair - correlation : Wo = 1.85 + 0.05x1013 Å4s - 1 ) . The segmental friction coeffi- cient / 2 8.9 ± 0.7 × 105 dynes ...
Page 58
... Rouse model based on the short time behavior . While for small values of the scaling variable ( u = Q2√ Wo ^ t < 7 ) we again observe good agreement with the Rouse model , at higher u we see systematic deviations towards slower ...
... Rouse model based on the short time behavior . While for small values of the scaling variable ( u = Q2√ Wo ^ t < 7 ) we again observe good agreement with the Rouse model , at higher u we see systematic deviations towards slower ...
Page 61
... Rouse model . For longer times or larger values of the Rouse scaling variable strong deviations from Rouse dynam- ics towards slower relaxation are found . Thereby , and importantly , the scaling with the Rouse variable is preserved ...
... Rouse model . For longer times or larger values of the Rouse scaling variable strong deviations from Rouse dynam- ics towards slower relaxation are found . Thereby , and importantly , the scaling with the Rouse variable is preserved ...
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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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