In this study, the hyperbranched polyester were successfully grafted onto graphene oxide (GO). The mechanical performance and curing kinetics of epoxy resin (EP), EP/ graphene oxide (EP/GO), and EP/ hyperbranched polyester grafted GO (EP/GO‐B) were investigated by means of mechanical tests and differential scanning calorimetry (DSC). Results revealed that the presence of GO lowered the cure temperature and accelerated the curing of EP, and the addition of GO‐B exhibited a stronger effect in accelerating the cure of EP compared with GO. Activation energies were calculated using Kissinger approach, and Ozawa approach, respectively. Results revealed lowered activation energy after the addition of GO or GO‐B at low degrees of cure, indicating that GO had a large effect on the curing reaction. The presence of GO facilitated the curing reaction, especially the initial epoxy‐amine reaction. Moreover, GO‐B exhibited better performance. Related mechanism was proposed.

中文翻译：

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表面改性氧化石墨烯对环氧树脂力学性能和固化动力学的影响

在这项研究中，超支化聚酯已成功接枝到氧化石墨烯（GO）上。通过机械测试和差示扫描量热法（DSC）研究了环氧树脂（EP），EP /氧化石墨烯（EP / GO）和EP /超支化聚酯接枝GO（EP / GO-B）的机械性能和固化动力学）。结果表明，GO的存在降低了固化温度并加速了EP的固化，与GO相比，GO-B的添加在促进EP的固化方面表现出更强的作用。使用Kissinge r方法和小泽（Ozawa）计算活化能方法。结果表明，在低固化度下添加GO或GO-B后，活化能降低，表明GO对固化反应的影响很大。GO的存在促进了固化反应，特别是初始的环氧胺反应。此外，GO‐B表现出更好的性能。提出了相关机制。