Study of Mixed Mesomorphism in Binary Systems of Azo-Ester Mesogens With Structurally Dissimilar Nonmesogenic As Well As Mesogenic Ester Homologues

摘要

We have studied mixed mesomorphism in four binary systems comprising two azo-ester mesogens, viz. 4-(4'-n-alkoxybenzoyloxy)3-methylphenyl azo-2" and 4"-dimethylbenzenes (where n-alkoxy is n-butoxy or n-hexyloxy), and two ester nonmeso- genie and mesogenic components, viz. 4-nitrophenyl-4'-n-alkoxybenzoates (where n- alkoxy is n-butoxy or n-hexyloxy). All the four binary systems are mesogenic in nature, showing nematic phase with threaded/marble texture. The phase diagrams of the bi-nary systems are plotted and eutectic transition temperatures and maximum mesophase ranges of the nematic mesophase in all the systems are determined.