Abstract

The phase behaviour under pressure of two disc-like mesogens are studied with a metabolemeter. The investigated compounds are (-)-2,3,6,7,10,11-hexa-[S-(3-methyl)- n-nonanoyloxy] triphenylene and 2,3,6,7,10,11-hexa-( n- dodecanoyloxy) triphenylene. The weakly first order or practically second order mesomorphic transitions are detected. The pressure-temperature phase diagrams are established. The volume changes for the first order phase transitions are determined.

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