苯并恶嗪BMI环氧树脂的固化动力学.pdfVIP

/BM I/ 李 玲 (, 030051) 制备了苯并噁嗪树脂/BM I/环氧树脂三元体系, 采用动态 D C分析了三元体系的固化反应过程 并用 K issinger 和 Ozaw a 法分别求得三元体系的反应活化能为 89. 5 kJ/mol 由 Crane 理论计算得到该体系 的固化反应级数 n = 0. 93级反应; 根据计算的动力学参数, 建立了三元体系的固化动力学模型利用所建立 的固化动力学模型分别预测了等温和动态条件下, 三元体系的固化反应特性得到了三元体系的固化工艺为 180 /1 h+ 200 /2 h+ 230 /2 h, 后处理工艺为 250 /2 h 苯并噁嗪, 活化能, 环氧树脂, 双马来酰亚胺, 固化 Curing Reaction ofModification Benzoxazine/Bismalemi ide/Epoxy Resin L iL ing ( Institu te ofM aterial cience and Technology ofNorth University of China, Taiyuan 030051) Abstract W e have developed new polym eric system s based on the ternarym ixture of typical benzoxazinemono mersw ith a typ icalmod ification bismalemi ide and epoxy resin. N onisothermal d ifferential scanning calormi etry (D C) w as used to follow the curing reaction. The analyses show ed that there are a exotherm ic reaction peak from 164 to 306 for the modification benzoxazine/b ismalemi ide/epoxy resin system and top of the peak is 240 , w hich con firmed main reaction ofmod ification benzoxazine/bism alemi ide/epoxy resin system. The curing process temperatures such as gelation temperature (Tge l ) = 151 , curing temperature (Tp ) = 224 and postcuring (T treat ) = 295 w ere acquired. The reaction energy of themodification benzoxazine/b ismalemi ide/epoxy resin system w as 89. 5 kJ/mol and the reaction level is 0. 93 by using K issinger and Crane equation. The cure k inetic model of the curing process based on n order reaction equationw as established, wh ichw as used for smi u lation of the curing reaction characteristics. Cu ring techn ics is 180 / 1 h+ 200 /2 h+ 230 /2 h, postcuring techn ics is 250 /2 h. K ey w ord s Benzoxazion, Reaction energy, Epoxy resin, Modified bismalemi ide, mi u lation