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Abstract
A procedure is described to determine the initial value of the surface tension of a freshly formed MBBA (p-methoxybenzylidene-p′-n-butylaniline) drop using the pendant drop method. A gastight measuring chamber was constructed for the measurements in different gas atmospheres. The relationship between the initial value of surface tension and gas sorption, with emphasis on the effect of gas type and gas pressure, is presented. The determined initial values of the surface tension are used to study the time-dependence of the surface tension of MBBA, both in its nematic (n) phase and in its isotropic (i) phase, and will be used for the further time-dependent studies. The observed behaviors of the surface tension of MBBA in different gas atmospheres are discussed.