| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.607 |
| 발표분야 | 기능성 고분자 |
| 제목 | Blends of Polyamic acids for Alignment Films of Vertically Aligned LCD |
| 초록 | Polyimides have been widely used as a material for electro-optic devices on their own advantages such as excellent thermal property, good mechanical property and electrical property, etc.1 In this study, we have synthesized new hybrid films (BPIs) from blends of two polyamic acid solutions, which can be used for the liquid crystal alignment layer of vertically aligned liquid crystal display (VA LCD). The PAA-1 was synthesized from the functional diamine, 1-(3,5-diaminophenyl)-3-octadecyl-pyrrolidine-2,5-dione [DA-L-18IM] and cyclobutane-1,2,3,4-tetracarboxylic dianhydride [CBDA] and the PAA-2 was prepared from the general aromatic amine, 4,4'-diamino-diphenylmethane [MDA] and cyclobutane-1,2,3,4-tetracarboxylic dianhydride [CBDA] in NMP. Then, we have obtained the BPAAs with the change of contents of PAA-1 and PAA-2. As shown in Fig 1, we have investigated the electro-optic properties of LCD cell fabricated with the hybrid films (BPIs), which showed very high pretilt angle above 88°. At Fig 2, we have also investigated the surface properties of the hybrid films (BPIs) that were related with the pretilt angles. Futhermore, we have observed that the most of PAA-1 in the BPAAs have exited on surface of hybrid films, which induced the high pretilt angles. Fig. 1. Pretilt angles with change of contents of PAA-1 Fig. 2. Surface tensions with change of contents of PAA-1 참고문헌 1. J. G. LIU, M. H. HE, H. W. ZHOU, Z. G. QIAN, F. S. WANG, S. Y. YANG, Journal of polymer Science, 40, 110-119 (2002) |
| 저자 | 이윤정1, 최중근1, 이범진2, 오재민2, 홍성권3, 이미혜1 |
| 소속 | 1한국화학(연), 2(주) 제일모직, 3충남대 |
| 키워드 | alignment layer; LCD; polyimide; blending; pretilt angle |
