The phase transitions in a few members of homologous series of 4,4′-dialkylbiphenyls were reinvestigated. The new orthogonal smectic phase existing between the smectic E and the smectic SBeryst. phase was found in these compounds. The existence of a different smectic E phase in the same compounds was confirmed by thermomicroscopic, roentgenographic and DSC studies. Measured and calculated lattice spacings in E, E′ and B phases are given.
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Czupryński et al. (1995) studied this question.
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