アミン蒸気処理されたアゾベンゼン含有ポリイミド光配向膜の面内異方性がプレチルト角に与える影響

抄録

Photo-aligned films of an azobenzene-containing polyimide (Azo-PI) treated with octadecylamine (ODA) vapor can induce a large pretilt angle. Both average inclination angle and in-plane order of the Azo-PI backbone structure were significantly enhanced by the ODA vapor treatment. In this study, we have investigated the influence of the in-plane order of Azo-PI backbone structure on the pretilt angle generation. Photo-alignment layers with different in-plane molecular order but almost the same average inclination angle were prepared by two different photo-alignment treatments: single oblique angle irradiation of unpolarized light (UP-L) at 45º, and double light exposure of normal angle irradiation of linearly polarized light (LP-L) followed by oblique angle irradiation of UP-L. The difference in the pretilt angles generated by the two different photo-alignment layers was very small. This result suggests that the influence of the in-plane anisotropy of alignment layers on the pretilt angle generation is minor.