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Liquid Crystal Alignment Stability of Polyvinylcinnamate Photonslignment Layer  

Lim Ji-Chul (LG. Philips LCD)
Choi Sie-Hyung (LG. Philips LCD)
Kim Whanki (Materials Research Center for Information Display, Kyung Hee University)
Kim Sung Soo (Materials Research Center for Information Display, Kyung Hee University)
Song Kigook (Materials Research Center for Information Display, Kyung Hee University)
Publication Information
Polymer(Korea) / v.29, no.4, 2005 , pp. 413-417 More about this Journal
Abstract
Orientations of liquid crystal molecules on a surface of a film of photoreactive polyvinylcinnamate were investigated in order to apply as an alignment layer of LCD. When the polyvinylcinnamate film was exposed to linearly polarized W light, optical anisotropy was induced in the film through a selective photoreaction. Liquid crystal molecules on a surface of the film was aligned along the oriented polymer chain direction through intermolecular interactions. Thermal and light stability of the photoaligned LC cell were studied by investigating LC alignment changes after the alignment layer was treated with heat and W light. When the film was exposed with linearly polarized UV several times, the LC alignment was induced only along the final UV exposure direction.
Keywords
liquid crystal, alignment; photoreaction; stability; polyvinylcinnamate.;
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1 T. Sugiyama, S. Kuniyasu, and S. Kobayashi, Mol. Cryst. Liq. Cryst., 231, 199 (1993)   DOI
2 S. Kobayashi and Y. Iimura, SPIE Proc., 2175, 122 (1994)
3 W. Lee, J. Lim, S. Paek, K. Song, and J. Chang, Korea Polym., J., 9, 339 (2001)
4 M. Obi, S. Morino, and K. Ichimura, Chem. Mater., 11, 656 (1999)   DOI   ScienceOn
5 K. Ichimura, Y. Akita, H. Akiyama, K. Kudo, and Y. Hayashi, Macromolecules, 30, 903 (1997)   DOI   ScienceOn
6 Y. Iimura, T. Satoh, S. Kobayashi, and T. Hashimoto, J. Photopolym. Sci. Tech.,8,258(1995)
7 N. Kawatsuki, K. Matsuyoshi, and T. Yamamoto, Macromolecules, 33, 1698 (2000)   DOI   ScienceOn
8 B. Lee, S. Choi, Y. Kim, and K. Song, Mol. Cryst. Liq. Cryst., 316, 197 (1998)   DOI
9 K. Ichmura, Y. Suzuki, T. Seki, A. Hosoki, and K. Aoki, Langmuir, 4, 1214 (1988)   DOI   ScienceOn
10 H. Tomita, K. Kudo, and K. Ichimura, Liq. Cryst., 20, 171 (1996)   DOI   ScienceOn
11 K. Ichimura and Y. Hayashi, Thin Solid Films, 235, 101 (1993)   DOI
12 M. Schadt, H. Seiberle, and A. Schuster, Nature, 381, 212 (1996)   DOI   ScienceOn
13 J. L. Keddie, R. A. Jones, and R. A. Cory, Europhys. Lett., 27, 59 (1994)   DOI   ScienceOn
14 M. Schadt, H. Seiberle, A. Schuster, and S. Kelly, Jpn. J. Appl. Phys., 34, 3240 (1995)   DOI
15 B. Lee, S. Ham, J. Lim, and K. Song, Polymer(Korea), 21,1059 (1997)
16 T. Kajiyama, K. Tanaka, and A. Takabara, Macromol, 28, 3482 (1995)   DOI   ScienceOn
17 M. Schadt, K. Schmitt, V. Kozinkov, and V. Chigrinov, Jpn. J. Appl. Phys., 31, 2155 (1992)   DOI
18 K. Ichmura, H. Akiyama, K. Kudo, N. Ishizuki, and S. Yamamura, Liq. Cryst., 20, 423 (1996)   DOI   ScienceOn
19 K. Ichimura, Liq. Cryst., 3,67 (1996)
20 K. Ichimura, Y. Akita, H. Akiyama, Y. Hayashi, and K. Kudo, Jpn J. Appl. Phys.,35,L992(1996)   DOI