A Study on Rubbing-induced Molecular Alignment on an Orientation Layer of Polyimide for Liquid Crystal Display

LCD의 폴리이미드 배향막에서 Rubbing에 의한 분자배향에 관한 연구

  • 최승우 (울산대학교 재료공학과) ;
  • 정재원 (포항공과대학교 화학과) ;
  • 김승빈 (포항공과대학교 화학과) ;
  • 황상만 ((주)삼성전관 LCD사업부) ;
  • 천희곤 (울산대학교 재료공학과) ;
  • 조동율 (울산대학교 재료공학과)
  • Published : 1998.04.01

Abstract

To elucidate the liquid crystal(LC) molecules alignment mechanism, it is important to determine the molecular orientation of the rubbed polymer surface molecules that directly contact with LC molecules. In this work, the molecular orientation on a rubbed surface of polyimide (SE-3310, Nissan) film has been studied by polarized FTIR absorption spectroscopy. It has been found that molecular chain on the rubbed surface of polymide film are oriented along the rubbing direction and are tilted up on an average by 5.0$^{\circ}$. In the SHG(Second Harmonic Generation) measurement, the pretilt angle of molecular chain on the poylmide fim was 4.6$^{\circ}$ fro, the surface plane. And the pedit angle of liquid crystal (ZLI-2293, Merck) molecules measured by crystal rotation method was 5.4$^{\circ}$in the same rubbing condition.

Keywords

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