BA9913环氧树脂固化动力学和TTT图

以BA9913树脂的全动态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高韧性环氧(牌号:BA9913)树脂的固化动力学参数,建立相应的动力学模型,并测定了BA9913树脂在100℃时保温不同时间后的凝胶固化度。利用Di Benedetto方程研究了该等温条件下BA9913树脂固化度与加热时间的关系,得到其玻璃化转变温度与固化时间的关系表达式。采用测凝胶储能模量的方法得到了BA9913树脂凝胶时的固化度和玻璃化转变温度之间的关系,绘制了BA9913树脂的TTT图。在此基础上对T300/BA9913的固化工艺进行了优化,并研究了优化前后T300/BA9913复合材料的内部质量、基本力学性能及玻璃化转变温度。

CURE KINETICS AND TTT-DIAGRAM OF THE BA9913 RESIN

In this paper,the cure kinetic parameters of the toughed epoxy resin (BA9913) were gained by dynamic DSC analysis based on the phenomenological model.Also,the phenomenological model of BA9913 resin was established.The curing degree of BA9913 were determined under different heating time at 100 ℃.Then,the relationship between curing degree and heating time of BA9913 resin was investigated with Dibenedetto equation based on the tested data,and the equation of glass transition temperature and curing time were obtained.The relationship between conversion at gelation and glass transition temperature of BA9913 resin was also obtained by shear modulus testing method.Then,the time-temperature-transition (TTT) diagram was presented based on the above results.Two kinds of T300/BA9913 composites under different isothermal time were manufactured by the guide of the TTT diagram.The internal quality,basic mechanical property and glass transition temperature of them were studied.The result show that the curing curve of T300/BA9913 now in use could be further optimized.