Thermal variation of surface tension at liquid crystal–isotropic liquid interface

Mohandas, K. P.; George, A. K.
March 1992
Journal of Chemical Physics;3/15/1992, Vol. 96 Issue 6, p4779
Academic Journal
The surface tension of two nematic liquid crystals bounded by an isotropic liquid (glycerin) was measured as a function of temperature. A spinning drop technique was used for the measurements. Unlike monotonically decreasing dependence found in most isotropic liquids, the surface tension-temperature characteristic showed more than one region with positive slope in the nematic phase. A sharp increase in surface tension was observed near the nematic-isotropic transition temperature. The results obtained are in qualitative agreement with the theoretical predictions of Croxton and Chandrasekhar.


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