A study on free volume of acrylonitrile-styrene copolymer and methyl methacrylate-styrene copolymer by using positron annihilation

Authors
Qi, CZ Zhang, SH Wu, YJ Zhong, YR Song, DK Wang, TM
Citation
Cz. Qi et al., A study on free volume of acrylonitrile-styrene copolymer and methyl methacrylate-styrene copolymer by using positron annihilation, J POL SC PP, 37(5), 1999, pp. 465-472
Citations number
18
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
ISSN journal
08876266 → ACNP
Volume
37
Issue
5
Year of publication
1999
Pages
465 - 472
Database
ISI
SICI code
0887-6266(19990301)37:5<465:ASOFVO>2.0.ZU;2-M
Abstract
The o-Ps lifetime tau(3) and the intensity I-3 of ST-AN copolymers and ST-M MA copolymers have been determined by using the positron annihilation techn ique. The average fi ee volume hole radius R is estimated according to Tao' s and Eldrup's model. The result shows that the average free volume hole si ze mainly attributes to lateral group volume and polarity of macromolecular chain as well as polymerizing temperature, and the o-Ps intensity I-3 to t he effect of the lateral group volume and the polarity. (C) 1999 John Wiley & Sons, Inc.