Abstract In this study, graphene oxide (GO) nanosheets were first functionalized by the acyl-chloride reaction and then reacted with hindered phenol (HP) to obtain HP grafted GO (GO-g-HP). The GO-g-HP prepared under the optimized condition exhibited a high efficiency against both thermal and photo oxidation of isotactic polypropylene (iPP). GO-g-HP exhibited a much better anti-aging efficiency than that of HP and GO used individually or that of their physical mixture. The outstanding anti-aging effect of GO-g-HP was attributed to the excellent synergistic effect produced between the chemically bonded GO and HP, which resulted in an improved oxygen barrier property of GO and excellent utilization of the free radical scavenging capability of GO and HP. Also, thanks to the grafting of HP on GO, the physical loss of HP, which was one of the main shortcomings for traditional small molecular antioxidants, was largely suppressed. It is expected that the GO-g-HP prepared can well meet the requirement of long-term applications of polymers in some harsh service conditions.

中文翻译：

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受阻酚化学接枝酰氯官能化氧化石墨烯及其在聚丙烯抗降解中的应用

摘要 在本研究中，氧化石墨烯 (GO) 纳米片首先通过酰氯反应进行功能化，然后与受阻酚 (HP) 反应得到 HP 接枝的 GO (GO-g-HP)。在优化条件下制备的 GO-g-HP 对全同聚丙烯 (iPP) 的热氧化和光氧化均表现出高效率。GO-g-HP 表现出比单独使用的 HP 和 GO 或它们的物理混合物更好的抗衰老效率。GO-g-HP 优异的抗老化效果归因于化学键合的 GO 与 HP 之间产生的优异协同效应，从而提高了 GO 的氧阻隔性能，并很好地利用了 GO 和 HP 的自由基清除能力。生命值。还有，由于在GO上嫁接了HP，HP的物理损失，这是传统小分子抗氧化剂的主要缺点之一，在很大程度上被抑制了。预计所制备的GO-g-HP能很好地满足聚合物在某些恶劣工况下长期应用的要求。