Abstract New graphene/polymer nanocomposites were prepared using graphene nanoplatelets (GNPs) and the epoxy system Epilok 60-566/Curamine 32-494. The GNPs were first dispersed into the curamine hardener using bath ultrasonication, followed by the addition of the epoxy resin. The cure kinetics were studied by DSC under non-isothermal and under isothermal conditions. The kinetic parameters of the curing process were determined using the non-isothermal Kissinger and Ozawa-Flynn-Wall models. The degree of curing increased with the addition of GNPs, while the activation energy decreased by 13.7% for the first reaction and by 6.6% for the second as obtained from Kissinger. An increase in thermal stability by the addition of GNPs was identified in the range of 360-580℃ using TGA. In terms of mechanical properties, addition of an optimum amount of 0.5%wt of GNPs in the hardener improved the Young’s Modulus by 37%. Nanoindentation measurements showed 9.4% improvement in hardness at 0.7%wt.

中文翻译：

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新型石墨烯/环氧树脂纳米复合材料的开发和固化动力学、热和机械性能的研究

摘要 使用石墨烯纳米片 (GNP) 和环氧树脂系统 Epilok 60-566/Curamine 32-494 制备了新型石墨烯/聚合物纳米复合材料。首先使用浴超声将 GNP 分散到固化剂中，然后加入环氧树脂。通过DSC在非等温和等温条件下研究固化动力学。固化过程的动力学参数使用非等温 Kissinger 和 Ozawa-Flynn-Wall 模型确定。固化程度随着 GNP 的加入而增加，而从 Kissinger 获得的第一个反应的活化能降低了 13.7%，第二个反应的活化能降低了 6.6%。使用 TGA 在 360-580°C 范围内发现通过添加 GNP 提高了热稳定性。就力学性能而言，最佳添加量为0。硬化剂中 5%wt 的 GNP 将杨氏模量提高了 37%。纳米压痕测量表明，在 0.7%wt 时，硬度提高了 9.4%。