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고분자 분산형 액정 셀에서 혼합물의 비율에 따라 노광 온도가 초기 산란도에 미치는 영향

Study on Initial Scattering State as a Function of Curing Temperature for Polymer Dispersed Liquid Crystal Cells with Different Mixing Ratio

  • 김미숙 (전북대학교 신소재공학부) ;
  • 서영현 (전북대학교 신소재공학부) ;
  • 이명훈 (전북대학교 신소재공학부) ;
  • 이종문 (전북대학교 신소재공학부) ;
  • 이택수 (전북대학교 신소재공학부, (주)나노텍) ;
  • 이승희 (전북대학교 신소재공학부)
  • 발행 : 2004.01.01

초록

We have fabricated the polymer dispersed liquid crystal (PDLC) cell where a control of phase separation is very important. The factors to influence the phase separation are mixing ratio of LC and polymer, curing temperature and UV intensity. In this paper, we inspected the change of a phase separation as a function of curing temperature for the mixture of E7 and. NOA65 with different ratios. When the LC concentration is less than polymer such as LC:NOA65 = 40:60wt%, the PDLC cell is influenced strongly by the curing temperature. However, when the LC concentration is much less than polymer such as LC:NOA65 = 80:20wt%, it is influenced slightly by the curing temperature. The reason is because the mixture shows upper critical solution temperature behavior and therefore it is important to know the behavior of phase separation as a function of curing temperature of the mixture.

참고문헌

  1. Jpn. J. Appl. Phys. v.36 Light behavior analysis of twisted nematic liquid crystal H.Yoshida;J.Kelly https://doi.org/10.1143/JJAP.36.2116
  2. Trans. on EEM v.4 no.1 Rubbing angle effects on the electro-optic characteristics of in-plane switching liquid crystal display H.Y.Kim;I.S.Song;S.H.Lee https://doi.org/10.4313/TEEM.2003.4.1.024
  3. 전기전자재료학회논문지 v.15 no.1 유전율 이방성이 음인 액정을 이용한 이중 도메인 FFS 모드의 전기광학 특성 김향율;고재완;노정동;서대식;이승희 https://doi.org/10.4313/JKEM.2002.15.8.720
  4. 전기전자재료학회논문지 v.16 no.3 Fringe-Field Switching (FFS) 모드에서 액정의 유전율 이방성에 따른 동력학 안정성에 관한 연구 김미숙;김향율;이승희 https://doi.org/10.4313/JKEM.2003.16.3.224
  5. Jpn. J. Appl. Phys. v.29 Electrooptical properties of polymer films containing nematic liquid crystal microdroplets H.Nomura;S.Suzuki;Y.Atrashi https://doi.org/10.1143/JJAP.29.522
  6. Appl. Phys. Lett. v.64 Electrically switchable volume gratings in polymer-dispersed liquid crystals R.S.Sutherland;V.P.Tondiglia;L.V.Natarajan https://doi.org/10.1063/1.110936
  7. Jpn. J. Appl. Phys. v.34 Restructuring of polymer-dispersed nematic droplets in external electric field J.Ding;H.Zhang;J.Lu;Y.Yang https://doi.org/10.1143/JJAP.34.1928
  8. Mol. Cryst. Liq. Cryst. v.196 Curing parameters and phase behavior of an ultraviolet-cured polymer-dispersed liquid crystal G.W.Smith https://doi.org/10.1080/00268949108029689
  9. Phys. Rev. Lett. v.70 no.2 Mixing and phase separation in liquid crystal/matrix systems; determination of the excess specific heat of mixing G.W.Smith https://doi.org/10.1103/PhysRevLett.70.198
  10. Appl. Phys. Lett. v.81 no.19 Inhomogeneous nanoscale polymer-dispersed liquid crystals with gradient refractive index H.Ren;S.T.Wu https://doi.org/10.1063/1.1519102