부산대학교 도서관

Nematic cyanobiphenyls have been modified with small amount of polar additives. Phase transition temperatures as a function of composition of the prepared mixtures have been determined by polarization thermomicrscopy. The dielectric constant as a function of temperature has been determined via dielcometry measurements, and the dielectric anisotropy of the studied mixtures has been revealed. Broadening of the mesophase existence temperature range and enhancement of the dielectric anisotropy of the nematic biphenyls upon addition of polar dopants results from the supramolecular self-assembly via hydrogen bonding. [ABSTRACT FROM AUTHOR]