ISSN: 0256-1115 (print version) ISSN: 1975-7220 (electronic version)
Copyright © 2024 KICHE. All rights reserved

Articles & Issues

Language
English
Conflict of Interest
In relation to this article, we declare that there is no conflict of interest.
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.

All issues

Modification of Poly(vinyl cinnamate) Photo-alignment Layers Using Polymerizable Mesogens

1Center for Advanced Functional Polymers, Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusong-dong, Yusong-gu, Taejon 305-701, Korea 2Flat Display Lab., Technology Division, Display Devices Co. LTD., 575 Shin-Dong, Paldal-Gu, Suwon 442-390, Korea
oopark@sorak.kaist.ac.kr
Korean Journal of Chemical Engineering, January 2000, 17(1), 17-21(5), 10.1007/BF02789247
downloadDownload PDF

Abstract

Polymerizable mesogens were blended with poly(vinyl cinnamate)(PVCi) in order to improve the alignment properties of liquid crystals (LC) on the layer surface. Two types of cyanobiphenyl monomers, which have short (n=0) and long (n=11) spacers, were prepared, respectively. Polarized UV exposure at the elevated temperature increased the inclusion of the monomers into the network of the photo-products. Compositional studies showed that the short-spacer monomer improved homogeneous LC alignment and thermal stability, whereas the long-spacer monomer contributed to generate homeotropic LC alignment.

References

Bryan-Brown GP, Sage IC, Liq. Cryst., 20, 825 (1996)
Egerton PL, Pitts E, Reiser A, Macromolecules, 14, 95 (1981) 
Iimura Y, Kusano JI, Kobayashi S, Aoyagi Y, Sugano T, Jpn. J. Appl. Phys., 32, L93 (1993) 
Kim CK, Chung CH, Moon SH, Korean J. Chem. Eng., 13(3), 328 (1996)
Kim EJ, Park OO, Mol. Cryst. Liq. Cryst., 257, 41 (1995)
Kim EJ, Park OO, Li HF, Mol. Cryst. Liq. Cryst., 317, 245 (1998)
Kwon MH, Park OO, J. Rheol., 36, 507 (1992) 
Nakamura K, Kikuchi S, Nippon Kagaku Zasshi, 40, 2684 (1967)
Percec V, Pugh C, "Molecular Engineering of Predominantly Hydrocarbon-based LCPs," Side Chain Liquid Crystalline Polymers, McArdle, C.B., eds., Blakie & Son Ltd., New York, 52 (1989)
Schadt M, Schmitt K, Kozinkov V, Chigrinov V, Jpn. J. Appl. Phys., 31, 2155 (1992) 
Schadt M, Seiberle H, Schuster A, Keely M, Jpn. J. Appl. Phys., 34, 3240 (1995) 
Shannon PJ, Gibbons WM, Sun ST, Nature, 368(6471), 532 (1994) 
Shibaev VP, Kostromin SG, Plate NA, Eur. Polym. J., 18, 651 (1982) 
Song JK, Han KY, Chigrinov V, "Photo-alignment of LC by Dye Containing Azo-group," AM-LCD'96/IDW'96, 407 (1996)
Toney MF, Russell TP, Logan JA, Kikuchi H, Sands JM, Kumar SK, Nature, 374(6524), 709 (1995) 
Uchida T, Seki H, "Surface Alignment of Liquid Crystals," Liquid Crystals: Applications and Uses, Bahadur, B., eds., World Scientific, Singapore, 3, 34 (1992)
Yoon KH, Park OO, Kim JD, Korean J. Chem. Eng., 7(1), 18 (1990)

The Korean Institute of Chemical Engineers. F5, 119, Anam-ro, Seongbuk-gu, 233 Spring Street Seoul 02856, South Korea.
Phone No. +82-2-458-3078FAX No. +82-507-804-0669E-mail : kiche@kiche.or.kr

Copyright (C) KICHE.all rights reserved.

- Korean Journal of Chemical Engineering 상단으로