Comparison between low frequency Raman scattering and inelastic neutron scattering of amorphous polybutadiene shows that the light-vibration coupling coefficient is linearly frequency dependent. This agrees with earlier findings and we show here that it can be interpreted employing two different...

Neutron scattering experiments have been performed to explore the dynamics of polymers near the glass transition. The experimental data show three distinct types of relaxations: 1.(1) Susceptibility spectra exhibit a contribution in addition to phonons around a temperature independent...

The Debye-Waller factors of amorphous polystyrene and amorphous polybutadiene have been determined from neutron time-of-flight data using two different methods. The first uses the Q-dependence (Q momentum transfer) of the elastic intensity in the conventional way. The second employs the...

Incoherent inelastic neutron scattering experiments on the weakly fragile polymer glass polyisobutylene (PIB) show a fast inelastic relaxation component at temperatures exceeding the glass transition temperature, Tg = 200 K. The temperature dependence of the inelastic excess excitation is...

Thermal hysteresis associated with ferroelectric to paraelectric phase transition is investigated in a ferroelectric copolymer of vinylidene fluoride and trifluoroethylene, using X-ray diffraction and incoherent neutron scattering. The lattice spacing derived from the diffractograms, shows...