ORIENTATIONAL PHENOMENA IN COMB-SHAPED LIQUID-CRYSTAL POLYMERS INDUCED BY LASER-BEAM IRRADIATION

被引：4

作者：

SHIBAEV, V ^{[1
]}

KOSTROMIN, S ^{[1
]}

IVANOV, S ^{[1
]}

LASKER, L ^{[1
]}

FISHER, T ^{[1
]}

STUMPE, J ^{[1
]}

机构：

[1] HUMBOLDT UNIV BERLIN,DEPT CHEM,D-10099 BERLIN,GERMANY

来源：

MACROMOLECULAR SYMPOSIA | 1995年 / 96卷

关键词：

D O I：

10.1002/masy.19950960112

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Action of the laser illumination on optical properties of liquid crystalline (LC) comb-shaped acrylic and methacrylic copolymers containing cyanobiphenyl mesogenic groups and azo dye fragments has been studied. Under an illumination the cia-trans configurational changes of dye fragments take place and reorientation of the side groups towards a direction perpendicular to the electric vector of the actinic light occurs. As a result the photoinduced optical birefringence (Delta n = 0.05-0.11) appears. The detailed study of dichrotic and optical properties of polymeric films, kinetics and relaxation of Delta n, as well as mechanism of orientational transformations during a laser illumination are discussed. The induced optical anisotropy of the films can be changed reversibly by rotating the electric vector of the laser beam in respect to the film that may be used in reversible optical data storage.

引用

页码：157 / 159

页数：3

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