Optical and thermodynamic studies on lyotropic nematic phase in a binary mixture of liquid crystallinematerials

Author(s): T.N.Govindaiah

We report the results of our studies on optical and thermal properties of binary mixture of compounds, viz., tetradecyl trimethyl ammonium bromide (TTAB) and glacial acetic acid (GAA). The mixture exhibits very interesting schilieren texture of micellar nematic lyophase, smectic A (SmA), and SmG phases for all concentrations of TTAB sequentially when the specimen is cooled from its isotropic phase. The temperature variation of optical-birefringence has been discussed. Thermodynamic studies have also been discussed to understand the phase stability, chemical structure and molecular dynamics of the binary mixture of liquid crystalline materials.

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