以全动态DSC扫描实验为基础，结合半经验的唯象模型获得了基于唯象模型的具有双峰反应特性的高韧性双马来酰亚胺5429树脂的固化动力学参数，建立相应的唯象动力学模型。以5429树脂在180℃条件下，恒温不同时间的DSC实验数据为基础，利用DiBenedetto方程研究等温条件下固化度与加热时间的关系并得到玻璃化转变温度与固化时间的关系表达式，并采用凝胶盘法得到5429树脂不同温度下的凝胶时间，建立了凝胶时的固化度和玻璃化转变温度之间的函数关系，在此基础上绘制了T T T图，从T T T图中得到的5429树脂的最优固化工艺曲线与其标准固化工艺曲线一致。%The phenomenological model of 5429 resin was established by cure kinetic parameters of the bismaleimide (5429) with double‐heating wave reaction characteristics gained by dynamic DSC analysis combining with the phenomenological model .Also ,based on the DSC experimental data of 5429 resins at 180℃ with different heating time ,the relationship between curing degree and heating time of 5429 resin was investigated with DiBenedetto equation under isothermal condition ,and the equation of glass transition temperature and curing time were obtained .The gel time of 5429 resin was gained at differ‐ent time by gelation disk .The functional relationship between conversion at gelation and glass transi‐tion temperature of 5429 resin was also obtained .Then ,the time‐temperature‐transition (TTT) dia‐gram was presented based on the above results .The optimum curing curve of 5429 resin concluded from T T T diagram is consistent with the standard curing curve .
展开▼
