# Phase Transition Studies in Mixed Polymesomorphic Liquid Crystals with Cholesteric and Smectic A Phase

Research output: Contribution to journalArticle

### Abstract

Cholesteric mesomorphism was induced in a polymesomorphic liquid crystal with nematic and smectic A phases by mixing it with a low pitch cholesteric. A variety of mixtures for a wide range of concentrations were studied. It was observed that the addition of cholesteric liquid crystal disrupts the smectic phase of the parent polymesomorphic liquid crystal. The measured valuses of ultrasound velocity and specific volume and their related parameters were found to exhibit anomalies near each of the phase transitions. The mean interaction parameter \documentclass{article}\pagestyle{empty}\begin{document}$\bar \alpha$\end{document} was estimated for different mixtures and was found to decrease with increasing concentration of cholesteric liquid crystal in the mixture. It was observed that smectic A‐cholesteric transition becomes second‐order at a particular concentration in agreement with the theoretical predictions.

Original language English 361-365 5 Crystal Research and Technology 27 3 https://doi.org/10.1002/crat.2170270313 Published - 1992

### Fingerprint

Liquid Crystals
mixed crystals
Liquid crystals
Cholesteric liquid crystals
Phase transitions
liquid crystals
Density (specific gravity)
Ultrasonics
anomalies
predictions
interactions

### ASJC Scopus subject areas

• Chemistry(all)
• Materials Science(all)
• Condensed Matter Physics

### Cite this

In: Crystal Research and Technology, Vol. 27, No. 3, 1992, p. 361-365.

Research output: Contribution to journalArticle

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