Mechanical properties and orientation of atactic poly(methyl methacrylate): Sub-T-g annealing and stereocomplex formation

Citation
Jj. Wang et al., Mechanical properties and orientation of atactic poly(methyl methacrylate): Sub-T-g annealing and stereocomplex formation, MACRO RAPID, 22(12), 2001, pp. 948-951
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
MACROMOLECULAR RAPID COMMUNICATIONS
ISSN journal
1022-1336 → ACNP
Volume
22
Issue
12
Year of publication
2001
Pages
948 - 951
Database
ISI
SICI code
1022-1336(20010830)22:12<948:MPAOOA>2.0.ZU;2-K
Abstract
Communication: The mechanical properties and orientation behavior of atacti c poly(methyl methacrylate) films cast from acetone (A-aPMMA films) and chl oroform (C-aPMMA films), with subsequent sub-T-g annealing, have been studi ed. The formation of stereocomplex in sub-T-g-annealed A-aPMMA films and C- aPMMA films was demonstrated by means of differential scanning calorimetry. Stereocomplex in A-aPMMA films is more pronounced than in C-aPMMA films at each annealing temperature. It is proposed that stereocomplex formation ca n process at temperature below T-g, leading to enhanced yield stress and hi gher orientation.