CINNAMATE-CONTAINING POLYIMIDE AND ITS FUNCTION AS LIQUID CRYSTAL PHOTOALIGNMENT LAYER

XIA Qingling; YU Haifeng; LIAN Yanqing; WANG Xiaogong

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CINNAMATE-CONTAINING POLYIMIDE AND ITS FUNCTION AS LIQUID CRYSTAL PHOTOALIGNMENT LAYER

Research Article | 更新时间：2021-03-19

- CINNAMATE-CONTAINING POLYIMIDE AND ITS FUNCTION AS LIQUID CRYSTAL PHOTOALIGNMENT LAYER
- Acta Polymerica Sinica Issue 6, Pages: 914-918(2005)
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- Published：20 December 2005，
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XIA Qingling, YU Haifeng, LIAN Yanqing, WANG Xiaogong. CINNAMATE-CONTAINING POLYIMIDE AND ITS FUNCTION AS LIQUID CRYSTAL PHOTOALIGNMENT LAYER. [J]. Acta Polymerica Sinica (6):914-918(2005)
DOI：

XIA Qingling, YU Haifeng, LIAN Yanqing, WANG Xiaogong. CINNAMATE-CONTAINING POLYIMIDE AND ITS FUNCTION AS LIQUID CRYSTAL PHOTOALIGNMENT LAYER. [J]. Acta Polymerica Sinica (6):914-918(2005) DOI：

摘要

利用双酚A二胺单体(BISDA)与4

4-′(六氟异丙基)-双邻苯二甲酸酐(6FDA)的缩聚反应

制备了含有侧羟基的先驱聚合物PI-OH.通过PI-OH与肉桂酰氯的官能化反应

得到接有肉桂酸酯感光侧基的双酚A型聚酰亚胺PI-CI.用红外光谱(FTIR)、氢核磁共振(1H-NMR)分析、热分析(DSC)等方法表征了上述聚合物的结构和热性能.利用紫外-可见光谱(UV-Vis)对PI-CI的感光性能进行了研究.在线偏振紫外光辐照下

上述聚合物膜表现出二色向性.二向色性的强弱随光照能量的变化存在最大值.经线性偏振紫外光(LPUV)辐射后的PI-CI薄膜能诱导液晶盒中液晶分子发生均匀的定向沿面排列.上述实验表明

该聚酰亚胺是一类具有优良性能的潜在液晶光定向材料.

Abstract

The precursor polymer PI-OH was pmpared by the polycondension of bisphenol-A diamine monomer (BISDA) and a dianhydfide monomer (6FDA) in solution Then cinnamoyl chloride was reacted with the hydroxyl-containing precursor to prepare the photosensitive polymer PI-CI with einnamate pendant groups The polymers were characterized by FTIR

1H-NMR and differential scanning calorimetry (DSC) The photochemical properties of PI-CI were studied by using UV-Vis and FTIR The polymer showed significant photodichmism upon UV irradiation due to the photodimefization After processed by Linear Polarized Polymerization (LPP)

the spin-coated fihns of PI-CI wee used as photo-alignment layers to assemble sandwich-type liquid crystal cells via a capillary action using a nematie liquid crystal 5CB The observation by polarized microscope showed that the PI-CI photo-alignment layem 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.

关键词

光定向层聚酰亚胺线性偏振光聚合二向色性

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