2-9b 側鎖型高分子液晶の秩序構造の凍結法の開発と光学材料への応用

概要

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The ordered structure of side chain type liquid crystalline polymers(SC-LCP) in a liquid crystalline phase can be frozen at the lower temperature than the relaxation temperature of molecular rotation around the short axis of a mesogenic side chain (α_<rot> relaxation), if SC-LCP can be forced to quench within shorter cooling time than the relaxation time of α_<rot> relaxation. In this study, thermal molecular motional and optical characteristics of synthesized SC-LCP were investigated, and also, a quenching apparatus was set up in order to freeze the ordered structure of mesogenic side chains. SC-LCP showed a nematic phase from 362 K to 387 K and the α_<rot> relaxation time was 1〜2 ms nearby the nematic-isotropic phase transition temperature. The magnitude of optical retardation due to the order parameter of side chains gradually decreased with increasing tenperature. tt is suggested from the calculation on thermal conduction theory that the SC-LCP film of 1 μm thick can be cooled from 387 K to 195 K within 1〜2 ms by using a home-made quenching apparatus.
日本液晶学会の論文
1998-10-12