DEPOLARIZED LIGHT-INTENSITY STUDIES ON THE ORDER-PARAMETER IN LYOTROPIC LIQUID-CRYSTALLINE POLYMER

Authors
LIN JP LI SJ
Citation
Jp. Lin et Sj. Li, DEPOLARIZED LIGHT-INTENSITY STUDIES ON THE ORDER-PARAMETER IN LYOTROPIC LIQUID-CRYSTALLINE POLYMER, European Polymer Journal, 30(6), 1994, pp. 671-674
Citations number
24
Categorie Soggetti
Polymer Sciences
Journal title
European Polymer Journal → ACNP
ISSN journal
00143057
Volume
30
Issue
6
Year of publication
1994
Pages
671 - 674
Database
ISI
SICI code
0014-3057(1994)30:6<671:DLSOTO>2.0.ZU;2-M
Abstract
The order parameter, S, for the nematic solutions of poly(p-benzamide) (PBA) in concentrated sulfuric acid was determined with the Depolariz ed light intensity (DLI) technique. It was shown that the DLI techniqu e is a valuable and convenient method to study the order parameter in lyotropic liquid crystalline polymers. From the experiments, S was fou nd to decrease with temperature and increase with polymer concentratio n. The concentration dependence of S was further compared with results derived from theories proposed by Doi and Onsager.