Preparation and characterization of soluble bismaleimide-triazine resins based on asymmetric bismaleimide

摘要

A series of bismaleimide-triazine resins (EBT) were prepared from 2-(4'-maleimido) phenyl-2-(4'-maleimidophenoxyl) phenylbutane (EBA-BMI) and 2,2-bis(4-cyanatophenyl) propane (BADCy). The resins show attractive processability with good solubility in low boiling point solvents and wide processing temperature windows. Introduction of diallylbisphenol A (DBA) can decrease the curing temperature of EBT resins that the curing exothermic peak temperature shifted from 291 to 237 degrees C as the content of DBA increased from 0 to 20%. The curing condition influenced the thermal properties of the cured EBT resins. The glass transition temperature increased as the curing temperature and curing time increased. The cured EBT resins show high glass transition temperature up to 352 degrees C, high thermal stability with 5% weight loss temperature over 405 degrees C, low coefficient of thermal expansion about 45 to 52 ppm/degrees C, and high storage modulus up to 2.6 GPa at 250 degrees C. (C) 2016 Wiley Periodicals, Inc.