Cinnamate-containing polyimiide and its function as liquid crystal photoalignment layer

被引：0
|
作者：
Xia, QL [1 ]
Yu, HF [1 ]
Lian, YQ [1 ]
Wang, XG [1 ]
机构：
[1] Tsing Hua Univ, Sch Mat Sci & Engn, Dept Chem Engn, Polymer Res Inst, Beijing 100084, Peoples R China
来源：
ACTA POLYMERICA SINICA | 2005年 / 06期
关键词：
photo-alignment layer; polyimide; linearly polarized polymerization (LPP); photodichroism;
D O I：
暂无
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The precursor polymer PI-OH was prepared by the polycondension of bisphenol-A diamine monomer (BISDA) and a dianhydride monomer (6FDA) in solution. Then cinnamoyl chloride was reacted with the hydroxyl-containing precursor to prepare the photosensitive polymer PI-CI with cinnamate pendant groups. The polymers were characterized by FTIR, H-1-NMR and differential scanning calorimetry (DSC). The photochemical properties of PI-Cl were studied by using UV-Vis and FTIR. The polymer showed significant photodichroism upon UV irradiation due to the photodimerization. After processed by Linear Polarized Polymerization (LPP) the spin-coated films of PI-CI were used as photo-alignment layers to assemble sandwich-type liquid crystal cells via a capillary action using a nematic liquid crystal 5CB. The observation by polarized microscope showed that the PI-CI photo-alignment layers had the ability to align LC molecules in a very uniform way. The photosensitive polymer PI-CI of bisphenol-A is promising for the application as photo-alignment layer for liquid crystal displays.
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页码：914 / 918
页数：5
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