Thirty new asymmetric diphenylhyphen;diacetylene (PTTP) liquidhyphen;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 98thinsp;deg;C is studied. These new liquidhyphen;crystal compounds and mixtures should be particularly useful for infrared applications.
展开▼
