SUB-GLASS-TRANSITION-TEMPERATURE ANNEALING OF POLYCARBONATE STUDIED BY POSITRON-ANNIHILATION SPECTROSCOPY

Authors
SANDRECZKI TC HONG X JEAN YC
Citation
Tc. Sandreczki et al., SUB-GLASS-TRANSITION-TEMPERATURE ANNEALING OF POLYCARBONATE STUDIED BY POSITRON-ANNIHILATION SPECTROSCOPY, Macromolecules, 29(11), 1996, pp. 4015-4018
Citations number
24
Categorie Soggetti
Polymer Sciences
Journal title
Macromolecules → ACNP
ISSN journal
00249297
Volume
29
Issue
11
Year of publication
1996
Pages
4015 - 4018
Database
ISI
SICI code
0024-9297(1996)29:11<4015:SAOPSB>2.0.ZU;2-7
Abstract
Positron annihilation lifetime spectroscopy is used to monitor the sub -glass-transition-temperature (sub-T-g) annealing of a polycarbonate s ample. The intensity of ortho-positronium annihilation decreases as a stretched-exponential function of annealing time at T-g - 121 K. The d ata are successfully fitted to a model applied to free-volume relaxati on.