Chromonic Liquid Crystalline Nematic Phase Exhibited In Binary Mixture Of Two Liquid Crystals

摘要

A binary mixture of abietic acid and orthophosphoric acid (H_3PO_4) exhibits co-existence of biphasic region of Nematic + Isotropic (N+I), lyotropic Nematic (N_D) and Smectic-G (SmG) phases. The mixture exhibits N+I, N and SmG phases at different concentrations and at different temperatures. Mixtures with all concentrations of abietic acid exhibit I→N+I→N→SmG phases sequentially when the specimen is cooled from its isotropic melt. These phases have been characterized by using differential scanning calorimetric, X-ray diffraction, and optical texture studies.