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Determination of Wada Constant, Rao’s Constant, Compressibility and viscosity of a Cholesteric Liquid Crystal Solution at Various Temperatures
(International Journal of Engineering Research & Technology, 2014) Kanwar, Anita; Mhatre, Pritee
The ultrasonic waves having different frequencies propagate through the liquid crystal solution with different velocities at various temperatures. This fact helps in studying physical and chemical properties of Cholesteric liquid crystal (CLC) of different concentration at various temperatures. We in our laboratory have found out Acoustic Impedance, Rao’s constant, Adiabatic Compressibility, Wada constant, Van der Waals’ constant, Free Volume, Internal pressure and Classical Absorption Co-efficientof CLC solutionof different concentration. The measurements were made at various temperatures using Ultrasonic interferometer working at the frequencies 3MHz and 5MHz. The results so obtained are analyzed to see the effect temperature, concentration and transition of CLC into various mesophases. It is observed that when the miscibility is high and the solution is highly homogeneous the values of the parameters change drastically showing the change in the mesophases at phase transition temperatures.