Synthesis and Characterization of High Molecular Weight Side Chain Liquid Crystalline/Photoactive Polymers

被引：4

作者：

Murali, M. ^{[1
]}

Sudhakar, P. ^{[1
]}

Kumar, B. Satish ^{[1
]}

Samui, A. B. ^{[1
]}

机构：

[1] Naval Mat Res Lab, Div Polymer, Bombay 421506, Maharashtra, India

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2009年 / 111卷 / 05期

关键词：

liquid crystals; side chain liquid crystalline polymer; epoxy; photoactive polymers; azo polymers; synthesis; PHOTOINDUCED ALIGNMENT; LIGHT; CHROMOPHORE; CRYSTALS; BEHAVIOR;

D O I：

10.1002/app.29267

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Various liquid crystalline and photoactive azobenzene monomers were synthesized and attached to copoly(methyl methacrylate-glycidyl methacrylate) [copoly (MMA-GMA)] to get high molecular weight side chain liquid crystalline (LC)/photoactive copolymers. Further, spacers are generated in situ and reactive groups are obtained after the modification. All monomers and polymers were thoroughly characterized by FTIR, H-1 and C-13 NMR, UV-VIS spectrophotometry, gel permeation chromatography, thermogravimetric analysis, differential scanning calorimetry, and polarized optical microscopy. All side chain LC polymers showed higher thermal stability than that of copoly(MMA-GMX). Three LC and one azo monomer exhibited characteristic nematic mesophase where as one LC monomer has shown nematic and sanded smectic-A texture. The rate of trans-cis isomerization of polymer was lower than that of the monomer and both monomers and polymers showed slow back isomerization. Present approach offers convenient way to synthesize high/desired molecular weight photoactive LC polymers. (c) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 111: 2562-2573, 2009

引用

页码：2562 / 2573

页数：12

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