S. K. Kor, S. Pandey
Feb 15, 1976
Citations
0
Influential Citations
3
Citations
Journal
Journal of Chemical Physics
Abstract
This paper reports experimental results for the velocity and absorption of ultrasonic waves in the mesomorphic states of four cholesteric liquid crystals, namely, cholesteryl nonanoate, decanoate, oleate, and linoleate. The absorption has been measured by a pulse technique and velocity by an acoustic interferometer, both at a single frequency of 2 MHz. The results obtained for these materials furnish distinct similarities with the behavior of pure normal materials in the critical region. Anomalous increase in absorption and decrease in velocity observed across the isotropic–mesomorphic transition temperature in each case are interpreted in terms of pretransitional effect.