中文摘要：

制备了一种新型、高效的聚丙烯用庚二酸钙／石墨烯（CaHA／Gra）复合成核剂。采用傅里叶变换红外光谱仪（FTIR）测试了CaHA／Gra的复合结构，采用差示扫描量热仪（DSC）测试了CaHA／Gra改性聚丙烯（PP）的结晶和熔融行为。结果表明，庚二酸钙与石墨烯之间并不是简单的机械混合，而是通过化学键结合从而改善了CaHA／Gra在PP中的分散性；且在PP中加入成核剂CaHA／Gra可明显提高PP的结晶温度，在复合成核剂的添加量为0．2％（质量分数）时，可使PP的结晶峰温度从空白PP的121℃升高到126℃，同时在成核聚丙烯中出现含量相当的α晶型和口晶型，对平衡PP的刚性和韧性有着良好的作用。

英文摘要：

A novel, highly efficient compound nucleating agent calcium pimelate/graphene （CallA/ Gra） for polypropylene was prepared. The structure of CaHA/Gra was analyzed by Fourier transform infrared spectroscopy （FTIR）, and the crystallization behaviors of PP nucleated with CaHA/Gra was investigated by differential scanning calorimetry （ DSC ）. The results show that CallA and graphene are combined together through chemical bonds rather than mechanical blend, which causes the improved dispersion of CaHA/Gra in PP. In addition, the incorporation of CaHA/Gra into PP increases the crystallization temperature obviously. When the addition amount of CaHA/Gra in PP is 0. 2wt%, the peak crystallization temperature of nucleated PP is increased from 121 ℃ of virgin PP to 126 ℃.