Liquid crystalline materials find potential applications in diversified fields. Physical properties of liquid crystalline materials govern their use in different devices. A particular application demands the physical property in a particular range. In view of this the temperature variation of density and hence thermal expansion coefficient is measured on the three liquid crystalline compounds namely, 1. (E)-4-((hexyloxy)benzylidene)amino)phenyl 4-butoxy benzoate (S-1) 2. (E)-4-((hexyloxy)benzylidene)amino)phenyl 4-(decycloxy benzoate) (S-2) and 3. (E)-4-((hexyloxy)benzylidene)amino)phenyl 4-(tridecycloxy benzoate) (S-3) Using the thermal expansion coefficient, the number of thermo dynamical parameters was evaluated. The results revealed that all the thermo dynamic parameters show the characteristic changes at the phase transformation.
