Abstract

The internaolecular repulsions are approximately introduced into the molecular field theory of multi-component system of nematogens developed by Humphries-James-Luckhurst 1) (H-J-L), and its effects on nematic-isotropic transition temperatures are investigated in binary mixtures of nematogens. From the comparison of the theoretical and experimental results, one can conclude that the intermolecular repulsions are also important to treat the nematic-isotropic phase transition in binary mixtures in addition to the intermoleculer attractions. It is found that the effects of the intermolecular repulsions tend to lower the nematic-isotropic transition temperatures in binary mixtures.

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