A carbon fiber/epoxy resin prepreg was tested by DSC, and the phenomenological nth-order and autocatalytic reaction curing kinetic models of the prepreg were established. On this basis, the optimum curing process of the prepreg was obtained. In addition, in order to explore the effect of ply parameters on the mechanical properties of the laminates, the thermomechanical and mechanical properties of the laminates of [0]₁₀, [+ 45/ − 45]_5s and [0/90]_5s, prepared by compression molding, were investigated. The results show that the autocatalytic reaction model agrees well with the DSC curves obtained from the experimental data. The curing process of the carbon fiber/epoxy resin prepreg is 130 °C /60 + 160 °C/30 min. The flexural and impact strength of [0]₁₀ laminates are higher than that of [+ 45/ − 45]_5s and [0/90]_5s laminates. The glass transition temperature (T_g) of the laminates is 142–146 °C, and the loss factor of [0]₁₀ laminate is significantly higher than that of [+ 45/ − 45]_5s and [0/90]_5 s laminates. The great differences in the mechanical properties of the laminates are mainly due to the different amounts of 0° fibers, which lead to the different bearing and deformation capacity of the laminates under external force.

Graphic abstract

中文翻译：

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不同铺层取向的碳纤维/环氧树脂层压板的固化动力学、机械性能和热机械分析

采用DSC对碳纤维/环氧树脂预浸料进行了测试，建立了预浸料的现象学n阶和自催化反应固化动力学模型。在此基础上，得到了预浸料的最佳固化工艺。此外，为了探究层板参数对层合板力学性能的影响，对[0] ₁₀、[+ 45/ − 45] _5s和[0/90] _5s层合板的热机械和力学性能进行研究，通过压缩成型制备，进行了研究。结果表明，自催化反应模型与实验数据得到的DSC曲线吻合良好。碳纤维/环氧树脂预浸料的固化过程为130℃/60+160℃/30分钟。[0] ₁₀层压板的弯曲和冲击强度高于[+45/-45] _5s和[0/90] _5s层压板。层压板的玻璃化转变温度（T _g）为142-146 °C，[0] ₁₀层压板的损耗因子明显高于[+ 45/ − 45] _5s和[0/90] _{5 s}层压板。层压板力学性能的巨大差异主要是由于0°纤维的含量不同，导致层压板在外力作用下的承载和变形能力不同。

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