改性石墨烯的制备及对石墨烯/HDPE非等温结晶动力学的影响

Preparation of modified graphene and its effect on non-isothermal crystallization kinetics of MGN / HDPE

摘要: 为了研究改性石墨烯(MGN)对高密度聚乙烯(HDPE)结晶行为的影响, 采用化学氧化还原法制备出石墨烯(GN)和MGN, 并用熔融共混法制备出GN/HDPE和MGN/HDPE 复合材料。采用红外光谱仪和差示扫描量热仪对GN和MGN的结构及复合材料的结晶行为做了测试, 并用莫氏方程对复合材料进行了非等温结晶动力学研究。红外光谱结果表明硬脂酸分子已成功接枝在GN上; 差示扫描热分析结果表明MGN对HDPE结晶行为的抑制程度比GN更明显。

Abstract: To study the influence of modified graphene(MGN/HDPE ) composite on crystal behavior of high density polyethylene, graphene (GN) and MGN were prepared by chemical oxidation-reduction, followed by the preparation of GN/HDPE and MGN/HDPE composites with melt blending method. The structures of GN and MGN were characterized by FTIR, the crystallization of composites were analyzed by DSC. The non-isothermal crystallization kinetics of samples were extensively studied by Mo's equation. The results show that stearic acid has been successfully grafted onto the GN, and MGN displays restraining the crystallization of HDPE much more strongly than GN.