Estimation of Optical Anisotropy and Coefficient of Volume Expansion Of ZLI – 1695 In It’S Nematic Phase

Abstract

Optical anisotropy and coefficient of volume expansion of ZLI – 1695 (a mixture of 4-n-alkyl-4’-cyanobicyclohexane from E Merck) was calculated using Vuks formula, from refractive indices data determined for the compound.  The coefficient of volume expansion b, was also determined.  Optical anisotropy was observed to increase with temperature.  Also as expected, the value of the coefficient of volume expansion for this nematic phase is lower than those usually observed for ordinary liquids.

Keywords:Liquid crystal displays, nematic, optical anisotropy, coefficient of volume expansion, Vuck’s formula,