Dynamics at the glass transition in polymers: Results from neutron spectroscopy
- Forschungszentrum Juelich GmbH (Germany). Inst. fuer Festkoerperforschung
- Univ. del Pais Vasco, San Sebastian (Spain). Dept. de Fisica de Materiales
This short review presents quasielastic neutron scattering and dielectric experiments on the {alpha} and {beta}{sub slow} relaxation in polybutadiene and polyvinylchloride. Exploiting the momentum transfer dependent dynamic structure factor, spatial information about the underlying molecular motions is obtained. While the {beta}{sub slow} process reveals itself as a local jump with average jump distances of about 1.5 {angstrom}, the {alpha} relaxation is diffusive and occurs statistically independently from the {beta}{sub slow} process. With this result a consistent interpretation of dielectric spectra on the same polymer is achieved. Finally some new results on the {alpha} process in PVC are presented.
- OSTI ID:
- 580844
- Report Number(s):
- CONF-961202--; ISBN 1-55899-359-2
- Country of Publication:
- United States
- Language:
- English
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