Effect of additive on properties of polyimide liquid crystal vertical alignment film

被引：0

作者：

Ding, Zi-Jun ^{[1
]}

Liu, Ming ^{[1
]}

Shao, Lei-Shan ^{[1
]}

Wang, Ying-Han ^{[1
]}

机构：

[1] State Key Laboratory of Polymer Materials Engineering of China, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China

来源：

Gongneng Cailiao/Journal of Functional Materials | 2012年 / 43卷 / 01期

关键词：

Additives - Thermodynamic stability - Thermogravimetric analysis - Liquid crystals - Spectrometers;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The effect of the additive on alignment property, rubbing-resistance, thermal stabilities and transmittance of PI was investigated. The PI alignment film was prepared by pyromellitic dianhydride (PMDA), p-phenylenediamine (PDA) and 4-hexyloxy-bip henyl-3', 5'2-diaminobenzoate (C6-BBDA). The PI was modified by the additive (end capping agent and crosslinking agent). The structures and properties of PI were measured with infrared spectrometer (FT-IR), thermogravimetric analysis (TGA), ultra-visible spectrometer, polarized microscopy and pretilt angle tester. It was found that uniform LC vertical alignment was induced by four kinds of PI films. PI film modified with crosslinking agent showed excellent rubbing-resistance and still kept LC vertical alignment after strong rubbing in rubbing strength as 600 mm. PI films with the additives possessed good thermal stabilities. Moreover, PI films with the additives had high transmittance.

引用

页码：10 / 13