研究硬脂酸盐作为β成核剂对聚丙烯结晶性能的影响。WAXD结果表明:硬脂酸盐能诱导聚丙烯生成β晶型,在添加量为0.3%时,β晶的相对含量达到最大为76.64%。DSC曲线表明:硬脂酸盐改性的聚丙烯在152℃出现β晶型的熔融吸热峰,其结晶起始温度和结晶峰温度均向高温移动,表明添加硬脂酸盐可诱导PP中α晶向β晶转变,具有明显的β成核作用。 The effect of stearic acid salt as β nucleating agent on the crystallization behavior of polypropylene was studied. The results of WAXD showed that stearic acid salt can induce the formation of β crystal in polypropylene, and the content of β crystal reaches 76.64% at the maximum of 0.3%. The DSC curve shows that the stearic acid salt modified polypropylene exhibits a β crystal melting endotherm at 152 ℃, and both the crystallization start temperature and the crystallization peak temperature move to high temperature, indicating that adding stearate can induce PP α crystal β crystal transition, with significant β nucleation.