2b07 アミン蒸気処理によるAzo-PI光配向膜のプレチルト角制御性の劇的改善(物理・物性,口頭発表,2013年日本液晶学会討論会)

抄録

Photoalignment layers of polyimides containing azobenzene in the backbone structure (Azo-PIs) are formed by thermal imidization of the precursor (polyamide acids: Azo-PAAs) films exposed to polarized ultraviolet (UV) light. By performing a simple amine vapor treatment on the Azo-PAA film prior to UV exposure, we have succeeded in improving the photoalignment efficiency of the Azo-PI backbone structure. As a result, the controllable range of the pretilt angle of liquid crystal (LC) molecules was significantly extended without generation of thread-like textures.