| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.619 |
| 발표분야 | 기능성 고분자 |
| 제목 | Blend of Poly(amic acid)s Based on an Alicyclic Dianhydride and Diamine containing Long Alkyl Side Chain for Alignment Films of Vertically Aligned LCD Device |
| 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. In this study, we have prepared block copolyamic acid (BL-PAA) and two kinds of polyamic acid blends (BPI-1, BPI-2). The BPI-1 was prepared from PAA-1 and PAA-2. PAA-1 was prepared from 5-(2,5-dioxotetrahydrofuryl)-3-methyl-3-cyclohexene-1,2- dicarboxylic anhydride [DOCDA] and 1-(3,5-diaminophenyl)-3-octadecyl-pyrrolidine-2,5-dione [DA-L-18IM]. PAA-2 was prepared 4,4'-diamino diphenyl methane [MDA] and cyclobutane-1,2,3,4-tetracarboxylic dianhydride [CBDA]. BPI-2 was prepared from soluble polyimide and PAA-2. Soluble polyimide was prepared from DOCDA and DA-L-18IM. The BL-PAA was prepared by a block-co-polymerization of MDA, CBDA, DA-L-18IM and DOCDA in NMP. We have investigated surface properties of the polyimide films and the relationship of the pretilt angle with surface properties. LCD cells fabricated with the BPIs, which has octadecyl group-rich surface showed very high pretilt angle above 89°. On the other hand, BL-PAA showed relatively low pretilt angle below 30o. In addition we have investigated electro-optic properties of LCD cells fabricated with the BPIs and BL-PAA. Fig.1. Pretilt Angle of PIs Fig.2. Surface tension of PIs (a) BPI-1 (b) BPI-2 (c) BL-PAA Fig.3. AFM Image of PIs |
| 저자 | 최중근1, 이윤정1, 이범진2, 오재민2, 홍성권3, 이미혜1 |
| 소속 | 1한국화학(연), 2(주) 재일모직, 3충남대 |
| 키워드 | alignment layer; LCD; polyimide; polyamic acid; hybrid film |
