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Browsing by Author "MENG, HB"

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    ROOM-TEMPERATURE DIPHENYL-DIACETYLENE LIQUID-CRYSTALS
    (1992-08-10)
    WU, ST
    ;
    MARGERUM, JD
    ;
    MENG, HB
    ;
    DALTON, LR
    ;
    HSU, CS
    Thirty new asymmetric diphenyl-diacetylene (PTTP) liquid-crystal homologs are synthesized and their physical properties characterized. In addition to the observed high birefringence and relatively low viscosity, several dialkyl PTTP homologs also possess a low melting point, wide nematic range, and low heat of fusion enthalpy. These properties are highly desirable for forming eutectic mixtures with entirely PTTP components. A binary eutectic showing a nematic range from 10 to 98-degrees-C is studied. These new liquid-crystal compounds and mixtures should be particularly useful for infrared applications.