Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Liquid Crystal Aligning Capabilities on a New Photo-Crosslinkable Polyimide Based Polymer

새로운 광중합 가능한 폴리이미드계 몰리머을 이용한 액정 배향 특성

  • 황정연 (연세대학교 전기전자 공학과) ;
  • 서대식 (연세대학교 전기전자 공학과) ;
  • 이상렬 (연세대학교 전기전자 공학과) ;
  • 김재형 (인제대학교 물리학과) ;
  • 한은주 (수원대학교 물리학과)
  • Published : 2001.05.01
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Abstract

We synthesized a new photo-crosslinkable polymer (polyimide (PI)-chalcone-biphenyl (BP)) and liquid crystal (LC) aligning capabilities for nematic (N) LC with obliquely polarized UV exposure on a photo-crosslinkable polymer were studied. The high pretilt angle in NLC was obtained by polarized UV exposure on a PI-Chal-BP surface for 3 min. The high pretilt angle generated in NLC is attributed to the biphenyl moieties and the photo-dimerized chalclone group of a photopolymer. Also, good thermal stability of a PI-Chal-BP were obtained by thermogravimetric analysis (TGA) measurement until 450$^{\circ}C$. Finally, good voltage-transmittance curves and response time were observed by UV exposure on a PI-Chal-BP surface for 3min.

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References

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