Synthesis, Characterization, and Liquid Crystal Alignment Properties of Photosensitive Polyimide

被引：6

作者：

Kim, Yu Hyun

Min, Young Hoon

Lee, Seung Woo ^{[1
]}

机构：

[1] Yeungnam Univ, Sch Display & Chem Engn, Kyongsan 712749, South Korea

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2009年 / 513卷

关键词：

alignment layer; cinnamate chromophore; LCD; linearly polarized UV light; nematic liquid-crystal; photosensitive polyimide; polyimide; MOLECULAR-REORIENTATION; PHOTOREACTIVE POLYIMIDE; AROMATIC POLYIMIDES; SIDE-CHAINS; FILMS; SURFACES; BEARING;

D O I：

10.1080/15421400903195700

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A photoreactive polyimide, bearing a cinnamate photoreactive moiety in its side group, was synthesized. The photochemical reactions of the PSPI in the films were investigated in detail by UV-Vis and IR spectroscopies; the cinnamate chromophores were confirmed to undergo photodimerization. Linearly polarized ultra-violet light irradiation induced anisotropic reorientations of both the polymer main chains and the side groups in the film. The PSPI thin films were found to have unidirectional orientation ability as a result of photo-exposure with linearly polarized ultraviolet light, with the photoaligned polymer chains in the PSPI films able to effectively induce the alignment of nematic liquid crystals.

引用

页码：89 / 97

页数：9

共 17 条

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2-Q

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