NEUTRON-SCATTERING STUDY OF THE VIBRATION-RELAXATION CROSSOVER IN AMORPHOUS POLYCARBONATES

Authors
BUCHENAU U SCHONFELD C RICHTER D KANAYA T KAJI K WEHRMANN R
Citation
U. Buchenau et al., NEUTRON-SCATTERING STUDY OF THE VIBRATION-RELAXATION CROSSOVER IN AMORPHOUS POLYCARBONATES, Physical review letters, 73(17), 1994, pp. 2344-2347
Citations number
35
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
73
Issue
17
Year of publication
1994
Pages
2344 - 2347
Database
ISI
SICI code
0031-9007(1994)73:17<2344:NSOTVC>2.0.ZU;2-P
Abstract
We report on neutron scattering observations of the fast picosecond re laxation in two amorphous polycarbonates. Contrary to previous experie nce, one already observes these fast relaxations far below the glass t ransition, at temperatures where they cannot be related to the flow pr ocess. An explanation in terms of low-barrier structural relaxations i s proposed.