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광학활성 이소로이신을 출발물질로 한 강유전성 액정물질의 합성
정노희,기쿠치,카지야마 ( N,H . Jeong,H . Kikuchi,T . Kajiyama ) 한국유화학회 1996 한국응용과학기술학회지 Vol.13 No.3
A new one seies of chiral schiffs base containing benzylidene aniline moieties was synthesized and characterized by IR, ^1H NMR. elementary analysis, and polarized optical microscopy(POM). The yield of these synthetic compounds was in the range of 62~67℃. The results showed that most of the synthetic compounds were monotropic liquid crystal and exhibited chiral smectic C(Sc^*) liquid crystal phases, and the range of phase transition temperature was to 71.4℃ from 45.0℃.
박관선,최성부,정노희,남기대,카지야마 ( K . S . Park,S . B . Choi,N . H . Jeong,K . D . Nam,T . Kajiyama ) 한국유화학회 1996 한국응용과학기술학회지 Vol.13 No.2
The phase separated structure and the electo-optical properties of the polymer / liquid crystal(LC) composite films including a dye were investigated. The phase separated structure of the polymer / LC / dye composite film(GH composite film) including below 2wt% dye against LC was almost same with the composite film which does not include dye. But the electro-optical properties of the GH composite film strongly depended on weight fraction of the dye against the LC. The response time of the GH composite film increased with the increase of the dissolved dye in LC because the dye acts as a registivity for the orientation of LC molecules by the electric filed.
( 고분자 / 액정 ) 복합막의 상분리구조와 전기광학 특성
박관선,노창호,사공동식,남기대,카지야마 ( K . S . Park,C . H . Noh,D . S . Sakong,K . D . Nam,T . Kajiyama ) 한국유화학회 1995 한국응용과학기술학회지 Vol.12 No.2
The phase separated structure and the electro-optical properties of the (polymer/liquid) crystal : LC) composite film strongly depended on the weight fraction of LC in it. The continuous LC phase was formed in a three-dimensional polymer network when the LC weight fraction was above 40wt%. The aggregation structure of the composite film could be controlled by controlling the solvent evaporation velocity during the film preparation process. The smaller LC domains or channels were formed in the case of the faster solvent evaporation velocity. The composite film exhibited reversible light scattering-light transmission switching upon electric field -OFF and -ON states, respectiverly. The light scattering properties of the composite film strongly depended on the spatial distortion of the nematic directors as well as the mismatch in refractive indices between matrix polymer and LC.