选用有机季鏻盐作为插层剂对黏土进行有机化插层改性,制备出有机黏土,通过熔融插层法制备聚丙烯/有机黏土纳米复合材料.XRD表明有机季鏻盐改性的黏土与聚丙烯形成结构为剥离型与插层型并存的纳米复合材料.利用DSC研究了纳米复合材料的熔融过程,结果显示有机黏土对聚丙烯的结晶度影响不明显.XRD和DSC的研究均表明,有机黏土可以诱发聚丙烯产生不常见的γ晶型.当黏土含量为5 wt%时,γ晶型占整个结晶部分的12%左右. Organic quaternary phosphonium salts were used as intercalation agents to intercalate organic clay to prepare organic clays, and polypropylene / organic clay nano-composites were prepared by melt intercalation method. XRD indicated that the organic quaternary phosphonium salt modified clays and Polypropylene nanostructures with exfoliated and intercalated coexisting structures were investigated by DSC.The melting process of nanocomposites was studied by DSC.The results showed that the organoclay had no obvious effect on the crystallinity of polypropylene.The results of XRD and DSC showed that, Organic clay can induce polypropylene to produce unusual γ crystal form, and when the clay content is 5 wt%, the γ crystal form accounts for about 12% of the total crystal part.