Liquid Crystalline Epoxy Thermoset Obtained from Biphenyl Mesogen

Abstract: A liquid crystalline epoxy polymer based on an epoxy monomer with biphenyl type mesogenic compound was synthesized and characterized using differential scanning calorimetry, optical microscopy, and X-ray diffraction. The monomer without liquid crystalline properties was transformed into a liquid crystalline state by a curing reaction with 2,7-diaminofluorene. A smectic-like structure developed in time, in the temperature range between 132 and 162°C.