Abstract
Abstract The specific volume, v, of Terephthalylidene-bis-p-n-butylaniline(TBBA) is measured as a function of temperature from the nematic phase to the smectic C phase. The compound exhibits nematic, smectic A, smectic C, smectic G and smectic H phases. The changes in specific volume across the nematic to smectic A and smectic A to smectic C phase transformations and the calculated thermal expansion coefficients confirm the order of the N-SA transition as first order and SA-SC transition as second order. The volume jump across the N-SA transition is 0.16%.
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