Synthesis and thermal properties of liquid crystalline thermoset containing rigid-rod epoxy

4,4'-diglycidyloxy-alpha-methylstilbene (DOMS) and a novel liquid crystalline thermoset, D2A1 which is obtained from the reaction between DOMS and aniline were synthesized. The thermosets have been characterized with cross-polarized optical microscopy, differential scanning calorimetry, thermogravimetric analysis (TGA) and other techniques. D2A1 was smectic at room temperature and turned to nematic at 85 degrees C upon heating, then turned isotropic at 135 degrees C. Activation energies for decomposition (E-d) using TGA were calculated according to the tec alpha hnique of Flynn-Wall to determine E-d as a function of conversion by a weight loss process.