中文摘要：

采用广角X射线衍射仪和小角度X射线散射仪研究了注射成型聚丙烯（PP）在厚度方向上的品型变化。结果表明：β成核剂含量较低的PP，其表层β晶型的相对含量较大，芯层较小；β成核刺含量较高的PP．其表层B晶型的相对含量较小．而芯层较大。

英文摘要：

Crystallization through the depth of injection-molded polypropylene （PP） was studied by means of wide angle X-ray diffractometer （WAXD） and small angle X-ray scatterometer （SAXS）. The results indicate that larger amount of β-crystal in surface layer and smaller amount of β-crystal in core layer are obtained for PP with lower content of β nucleating agent; however, smaller amount of β-crystal in surface layer and larger amount of β-crystal in core layer are obtained for PP with higher content of β nucleating agent.