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Very fast relaxation in polycarbonate glass

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The European Physical Journal B - Condensed Matter and Complex Systems Aims and scope Submit manuscript

Abstract:

Relaxations in amorphous bis-phenol A polycarbonate are studied by neutron scattering, as a function of temperature below the glass transition. Two different processes are observed. One is very fast, with a characteristic time (∼ 0.3 ps), that is independent of temperature and momentum transfer. Conversely the other is slower, with a time which is dependent on temperature and momentum transfer. The very fast localized anharmonic motion is interpreted by the overdamping of low-frequency vibrational modes, by nearby dynamic holes. The slower relaxation is thermally activated and momentum transfer dependent. It corresponds to molecular group motions and possibly to the short-time regime of the segmental relaxation.

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Authors and Affiliations

  1. Laboratoire de Physico-Chimie des Matériaux Luminescents (UMR-CNRS 5620), Université Lyon I, 69622 Villeurbanne Cedex, France, , , , , , FR

    L. Saviot & E. Duval

  2. Département de Physique des Matériaux (UMR-CNRS 5586), Université Lyon I, 69622 Villeurbanne Cedex, France, , , , , , FR

    J.F. Jal

  3. Institut Laue-Langevin, 38042 Grenoble Cedex, France, , , , , , FR

    A.J. Dianoux

Authors
  1. L. Saviot
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  2. E. Duval
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  3. J.F. Jal
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  4. A.J. Dianoux
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Additional information

Received 29 February 2000 and Received in final form 13 June 2000

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Saviot, L., Duval, E., Jal, J. et al. Very fast relaxation in polycarbonate glass. Eur. Phys. J. B 17, 661–666 (2000). https://doi.org/10.1007/s100510070105

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  • DOI: https://doi.org/10.1007/s100510070105

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