| 학회 |
한국고분자학회 |
| 학술대회 |
2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 |
29권 2호, p.720 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
A soluble Photoreactive Polyimide with Chalcone Moieties in the Main Chain: Photoreactions and Liquid Crystal Photoalignment Capability in Thin Films |
| 초록 |
We have reported the synthesis of a photosensitive fluorinated polyimide based on chalconediamines and aromatic dianhydride, and its application as low loss photosensitive polymer for passive waveguide. Recently, we found this photosensitive fluorinated polyimide can also function as photoalignment materials for liquid crystal display (LCD). The photoreaction of polyimide upon linearly polarized UV light (LPUVL) light exposure was investigated by UV-vis spectroscopic method. LPUVL irradiation causes photocrosslinking of the polymers via the [2+2] photocycloadditon of the chalcone moieties. The photo-induced anisotropic surface of the film induces an efficient homogeneous alignment of liquid crystals. The LPUVL-induced alignment characteristics of the polyimide films were determined by optical retardation and polar diagram of resulting LC cells. The pretilt angle and E-O properties of photoaligned LC cells were also investigated. |
| 저자 |
Zhenxin Zhong, Xiang Dan Li, 이승희, 이명훈
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| 소속 |
전북대 |
| 키워드 |
Polyimide; Chalcone; Liquid Crystal; Photoalignment
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| E-Mail |
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