Phase Transition Studies in Liquid Crystals across I-N and N-S_c Phases in Alkoxy Benzoic Acids – Density Measurements

Abstract

Density is one of the simple and accurate techniques to obtain the information regarding the nature of the transition and pre transitional effects across any phase transformation in liquid crystals. Density is measured with temperature in well known alkoxy benzoic acids with alkoxy chain number from 3 to 12 and 16. Even though the density measurements are carried on some of the homologues in this series, we have carried out systematic studies on all the homologues available and the results are compared with the literature values. Whereever there is deviation the reasons for such deviations are explained.

Keywords:

• alkoxy benzoic acids
• homologues
• phase transition studies

Acknowledgments

The authors thank the Management, and the Principal of The Hindu College, Machilipatnam, for providing facilities to carry out the measurements. One of the authors Dr. P. V. Datta Prasad expresses his gratitude to DST, India for providing travel grant to attend the 22 ILCC at Jeju, South Korea from June 29th to July 4th 2008 where this paper has been presented.

Notes

*Literature values [12].