Photo-Sensitive Polyimide Containing Methoxy Cinnamate Derivatives on Photo-Alignment of Liquid Crystal

被引：2
|
作者：
Kim, Su Young [1 ]
Shin, Sung Eui [1 ]
Shin, Dong Myung [1 ]
机构：
[1] Hongik Univ, Dept Chem Engn, Seoul 121791, South Korea
来源：
MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2010年 / 520卷
关键词：
Liquid crystal display; methoxy cinnamic acid; photo-alignment; polyimide; SURFACE ANISOTROPY; LIGHT;
D O I：
10.1080/15421400903582881
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Photosensitive polyimide containing methoxy cinnamate derivatives as a photo-alignment layer is investigated. 4-Methoxy cinnamic acid, 2-methoxy cinnamic acid and 2,5-dimethoxy cinnamic acid were irradiated and the absorption spectra were obtained with irradiation time. 4-methoxy cinnamic acid and 2-methoxy cinnamic acid are observed isosbestic points at 258 nm and 250 nm, respectively and 2,5-dimethoxy cinnamic acid has no isosbestic pioint. 2-Methoxy cinnamic acid was most photosensitive with 30 sec irradiation time. Polyimide containing methoxy cinnamte derivatives was synthesized and the anisotropy of alignment layer was induced by irradiation linearly polarized UV (LPUV). UV irradiation of a film a of polyimide with 2-methoxy cinnamate proceeded predominantly by the photo-isomerizaiton.
引用
收藏
页码：392 / 397
页数：6
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