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Dynamics at the Glass Transition in Polymers: Results from Neutron Spectroscopy

Published online by Cambridge University Press:  10 February 2011

D. Richter ,
A. Arbe  and
J. Colmenero
D. Richter
Affiliation:
Institut für Festkörperforschung, Forschungszentrum Mich GmbH, Jülich, Germany
A. Arbe
Affiliation:
Departamento de Fisica de Materiales, Universidad del Pais Vasco, San Sebastian, Spain
J. Colmenero
Affiliation:
Departamento de Fisica de Materiales, Universidad del Pais Vasco, San Sebastian, Spain
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Abstract

This short review presents quasielastic neutron scattering and dielectric experiments on the α and βslow relaxation in polybutadiene and polyvinylchloride. Exploiting the momentum transfer dependent dynamic structure factor, spatial information about the underlying molecular motions is obtained. While the βSlow process reveals itself as a local jump with average jump distances of about 1.5 Å, the a relaxation is diffusive and occurs statistically independently from the βslow process. With this result a consistent interpretation of dielectric spectra on the same polymer is achieved. Finally some new results on the a process in PVC are presented.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 455: Symposium T – Glasses and Glass Formers–Current Issues , 1996 , 3
Copyright
Copyright © Materials Research Society 1997

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References

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