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- 2016
高韧性双马来酰亚胺树脂的固化反应动力学和TTT图
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Abstract:
采用动态DSC法，研究了高韧性双马来酰亚胺树脂的固化反应动力学。根据Kissinger方程和Crane方程，拟合得到双马来酰亚胺树脂的固化动力学参数，建立了该树脂的唯象模型。采用恒温DSC法，根据DiBenedetto方程，建立了双马来酰亚胺树脂的玻璃化转变温度与固化度之间的函数关系。采用凝胶盘法，获得了该树脂在不同温度下的凝胶时间，建立了凝胶时间和凝胶温度之间的函数关系，得到了树脂的时间-温度-转变（TTT）图。根据TTT图对复合材料的固化工艺进行优化。结果表明：预浸料在150℃恒温0.5 h后加压0.6 MPa，树脂具有一定的流动性，可制备内部质量完好的复合材料。 The curing reaction kinetics of high toughness bismaleimide resin was studied by dynamic DSC method, and the parameters of the curing kinetics for bismaleimide resin were obtained to establish a phenomenological model based on Kissinger and Crane equations. The function relationship between glass transition temperature and curing degree was established with isothermal DSC method based on DiBenedetto equation. By using gelation disk method, gel-time of the resin was obtained under different temperatures. The function relationship between gel-time and gel-temperature was established. The Time-Temperature-Transition (TTT) diagram of resin was obtained to optimize the curing process of the composites. The results show that the prepreg under 150℃ and kept 0.5 h then pressed 0.6 MPa, the resin has a certain mobility and the perfect internal quality composites could be obtained. 国家自然科学基金（51203144）
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