한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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The Structural Effects on The Pretilt Angle of Alignment Materials with Alkylcyclohexylbenzene as a Side Chain in Polyimides

  • Lee, Jong-Beom (Liquid Crystal Research Center, Department of Chemistry, Division of Natural Sciences Konkuk University) ;
  • Lee, Hyun-Kyung (Liquid Crystal Research Center, Department of Chemistry, Division of Natural Sciences Konkuk University) ;
  • Park, Jae-Chul (Liquid Crystal Research Center, Department of Chemistry, Division of Natural Sciences Konkuk University) ;
  • Kim, Yong-Bae (Liquid Crystal Research Center, Department of Chemistry, Division of Natural Sciences Konkuk University)
  • Published : 2004.08.23
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Abstract

Polyamic acid precursors were prepared by mixing various main chain dianhydrides, main chain diamines and side chain diamines. Copolyimide films with alkylcyclohexylbenzene as a side chain were prepared by thermal imidization of polyamic acid precursors. Pretilt angles on rubbed polyimides changed according to the side chain and main chain structures of the polyimide. Consequently, we found that LC pretilt angles of polyimide films with a liquid crystal structure as a side chain showed to be approximately 90$^{\circ}$ when a linear and rigid polyimide main chain and a side chain of suitable length were employed.

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