Copolymerizable initiator for improved polymer dispersed liquid crystal films
作者:
J.D. Margerum,
F.G. Yamagishi,
A.M. Lackner,
E. Sherman,
L.J. Miller,
C.I. Van Ast,
期刊:
Liquid Crystals
(Taylor Available online 1993)
卷期:
Volume 14,
issue 2
页码: 345-350
ISSN:0267-8292
年代: 1993
DOI:10.1080/02678299308027649
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The problems of photoinitiator contamination are addressed for the liquid crystal phase in polymer dispersed liquid crystal films formed by photopolymerization induced phase separation of liquid crystal from monomer solutions. Initiator contamination lowers the clearing point of the liquid crystal phase, and decreases the photostability and resistivity of the polymer dispersed liquid crystal. These problems are minimized by replacing the conventional photoinitiators with copolymerizable initiators which become incorporated in the polymer phase as it separates. Copolymerizable photoinitiators are studied and used to form polymer dispersed liquid crystals with higher clearing point liquid crystal phases, higher resistivity, and better photostability than polymer dispersed liquid crystals formed with conventional photoinitiators. These improvements provide very significant advantages for many polymer dispersed liquid crystal applications.
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