Abstract
The binary mixture of two nonmesogenic compounds viz., Didodecyl dimethyl ammonium bromide (DDAB) and ethylene glycol (EG) exhibits very interesting liquid crystalline phase's at large range of concentrations and temperature. The concentrations with lower/higher percentage of DDAB exhibit I-SmA-SmC*-SmE-K sequentially when the specimen is cooled from isotropic phase. Different liquid crystalline phases observed in the mixture were studied using DSC, X-ray, and Optical microscopic techniques. The temperature variations of optical anisotropy have also been discussed.
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