Synthesis of a series of chiral copolymers with azo groups and investigations of reversible liquid crystalline alignment induced by the LB films of these materials
作者:
YANQING TIAN,
YANZHI REN,
RUIPEN SUN,
YINGYING ZHAO,
XINYI TANG,
XIMIN HUANG,
SHIQUAN XI,
期刊:
Liquid Crystals
(Taylor Available online 1997)
卷期:
Volume 22,
issue 2
页码: 177-183
ISSN:0267-8292
年代: 1997
DOI:10.1080/026782997209540
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A series of liquid crystalline copolymers, poly{2-hydroxyethyl methacrylate}-co-{6-[4-(S2-methyl-l-butyloxycarbonylphenylazo)phenoxy]hexyl methacrylate} with an azobenzene moiety as photoreactive mesogenic unit, was prepared and investigated by using DSC, polarized optical microscopy and X-ray diffraction. The results show that these polymers exhibit smectic phases. Z-type Langmuir-Blodgett films of these copolymers were successfully deposited onto calcium fluoride and quartz. Reversible homeotropic and planar liquid crystal alignments were induced by using the photochromism of the LB films of one of the copolymers containing 20.6 mol% of the azo unit.
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