INFLUENCE OF HIGH-PRESSURE ANNEALING ON FREE-VOLUME IN POLYCARBONATE STUDIED BY POSITRON-ANNIHILATION

Authors
SZOCS F SAUSA O KRISTIAKOVA K KRISTIAK J KLIMOVA M
Citation
F. Szocs et al., INFLUENCE OF HIGH-PRESSURE ANNEALING ON FREE-VOLUME IN POLYCARBONATE STUDIED BY POSITRON-ANNIHILATION, European Polymer Journal, 31(10), 1995, pp. 1019-1020
Citations number
8
Categorie Soggetti
Polymer Sciences
Journal title
European Polymer Journal → ACNP
ISSN journal
00143057
Volume
31
Issue
10
Year of publication
1995
Pages
1019 - 1020
Database
ISI
SICI code
0014-3057(1995)31:10<1019:IOHAOF>2.0.ZU;2-V
Abstract
The method of positron annihilation was used to study changes of free volume in polycarbonate. Annealing at 180 degrees C and pressure 800 M Pa causes significant changes of free volume (similar to 23%) compared to nonannealed polycarbonate. The free volume compressibility was est imated to be similar to 3.10(-5) MPa(-1). The distribution of free vol ume has changed. This work discusses the influence of free volume on m olecular dynamics and the transportation mechanism of free radical dec ay.