スメクチック液晶側鎖とかご型シロキサン側鎖を持つランダム共重合体の特異なラメラ構造

抄録

Random copolymers with azobenzene and polyhedral oligomeric silsesquioxane (POSS) side chains were synthesized. The liquid crystalline structure of the random copolymers was analyzed by X-ray scattering measurement in a bulk state. The copolymers exhibited the first order peak at 5.7 nm with several higher order peaks at regular intervals, indicating that the copolymers formed a highly ordered smectic lamellar structure. The azobenzene homopolymer adopts the smectic phase with ca. 3 nm of the smectic lamellar spacing, and the POSS homopolymer exhibits an amorphous phase. The copolymers exhibited high smectic lamellar ordering with large spacing. We presume that the unexpectedly highly ordered lamellar structure of the copolymers is formed by nano-segregation between the azobenzene smectic layers and POSS layers.