PBa05 主鎖に光反応性基を有する光架橋性高分子薄膜上での液晶の配向制御

概要

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We present linearly polarized (LP) UV photoreaction of photo-crosslinkable block copolvesterethers comprising a hard segment of polyester and a soft segment of poly(tetramethylene ether) (PTMG), and alignment behavior of liquid crystals (LCs) on the resultant photoreacted polymer films. Copolyesterethers with polyester segments of poly(hexamethylene p-phenylenediacrylate)-co-poly(hexamethylene 1,4-dibenzoate) with various copolymerization ratio were used in this study. The LP-UV irradiation resulted in a negative optical anisotropy of the polymer films, and a homogeneous photoalignment of LCs could be achieved on the photoreacted polymer film. The direction of the LC alignment was perpendicular to the electric vector of the incident polarized light when using the homopolyester segment, while a reversion of the alignment direction from parallel to perpendicular was observed when using co-polyester segment, depending on the irradiation doses.
日本液晶学会の論文
1999-09-28