Thermodynamic parameters of some benzylidene amino phenyl benzoate liquid crystals

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.