2B09 Liquid Crystalline Phase Transition of Organophosphazene with Phenylazobenzene Side Groups

Abstract

We prepared hexakis (4- (4'-decyloxy) phenylazophenoxy) cyclotriphosphazene (HDPCP) and octakis (4- (4'-decyloxy) phenylazophenoxy) cyclotetraphosphazene (ODPCP). Their phase transitions were studied using DSC and X-ray diffraction measurements and polarizing microscope observations. In HDPCP, a schlieren texture with a n ≧ 2 discrination was observed in a mesophase, which suggests the existence of a higher ordered smectic phase. No mesophase was observed in ODPCP.