Research on the preparation of heat-resistant epoxy resin cured by o-carborane-based diamine

A novel carborane-containing epoxy resin was prepared via the curing reaction between epoxy resin (E51) and 1,2-bis(4-aminophthalimide)dimethyl-1,2-dicarba-closododecaborane (4-AP CBR). According to the nonisothermal differential scanning calorimetry method and the T-β extrapolation method, the curing temperatures of the 4-AP CBR/E51 system were theoretically determined. The cured carboranyl epoxy resin was analyzed by thermogravimetric analysis (TGA), which revealed that the resin had excellent thermal stability and thermal oxidative stability. The results of TGA indicated that the initial decomposition temperature of the resin was exceeding 400°C and the char yield at 800°C was around 60% both under nitrogen and in air atmosphere.