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Miscibility Study of Nematic Liquid Crystal with Cholesteric Liquid crystal

Dr.Rita Gharde, Mrs.Manisha G. Bhave

Liquid crystals are characterized by high molecular orientation order in their mesomorphic states. The mixture of liquid crystals influences the molecular orientation of liquid crystal compound consequently affecting their physical properties. In this paper, the main focus is on the study of the mixtures of Nematic liquid crystal and Cholesteric liquid crystal in different proportions. We have used Differential scanning calorimetry (DSC) technique to measure the Phase transition temperatures. Fourier Transform Infrared Spectroscopy (FTIR) and Ultraviolet–Visible (UV) spectroscopy are used to analyze the relative concentration of liquid crystals in the mixtures and their spatial distribution.The values of pitch for Cholesteric liquid crystal and the mixtures were calculated from ordinary refractive indices. Because of its low phase transition temperatures and less requirement of energy, the mixture of Cholesteric chloride with Cholesteryl oleate in 30%+70% proportion holds promise in the optical as well as non-optical applications of liquid crystals.