THE EFFECT OF CRYSTALLINITY ON CHAIN MOBILITY AND FREE-VOLUME IN THE AMORPHOUS REGIONS OF A MISCIBLE POLYCARBONATE POLYESTER BLEND

Authors
ZIPPER MD SIMON GP CHERRY P HILL AJ
Citation
Md. Zipper et al., THE EFFECT OF CRYSTALLINITY ON CHAIN MOBILITY AND FREE-VOLUME IN THE AMORPHOUS REGIONS OF A MISCIBLE POLYCARBONATE POLYESTER BLEND, Journal of polymer science. Part B, Polymer physics, 32(7), 1994, pp. 1237-1247
Citations number
46
Categorie Soggetti
Polymer Sciences
Journal title
Journal of polymer science. Part B, Polymer physics → ACNP
ISSN journal
08876266
Volume
32
Issue
7
Year of publication
1994
Pages
1237 - 1247
Database
ISI
SICI code
0887-6266(1994)32:7<1237:TEOCOC>2.0.ZU;2-#
Abstract
Homopolymers and blends of polycarbonate/ThermX have been investigated by differential scanning calorimetry, dynamic mechanical analysis, de nsity measurements, and positron annihilation lifetime spectroscopy. T he study focuses on the chain mobility and free volume in the amorphou s miscible regions of the blends and how this mobility and free volume are affected by increasing crystallinity. It is proposed that judicio us annealing, which results in increasing crystallinity (while avoidin g ageing or transesterification), induces a constraint on the amorphou s region leading to an increase in T(g) and coalescence of free volume sites. (C) 1994 John Wiley & Sons, Inc.