中文摘要：

为了研究β-成核剂在合金中分散对聚丙烯（PP）成核效率的影响，采用2种方法制备了负载型β-成核剂成核PP（β-PP）／聚酰胺6（PA6）合金。用差示扫描量热仪和广角X射线衍射仪研究了不同制备方法及熔融温度对β-PP／PA6合金的结晶行为、熔融特性和β-PP含量的影响。结果表明：PP，PA6先熔融再降温至／90℃加入成核剂制备β-PP，PA6合金的β-PP含量高于先制备β-PP再与PA6混炼制备的合金。熔融温度高有利于β-PP／PA6合金中PP形成β-PP。

英文摘要：

A polypropylene/polyamide 6 （PP/PA 6） alloy nucleated by a novel supported B-nucleating agent was prepared in an internal mixer with two different methods, aiming at investigating the effect of ,dispersion of the B-nucleating agent in the PP/PA 6 alloy on the nucleating efficiency. The dependences of non-isothermal crystallization behavior, melting characteristics and β-PP content of the alloy on the preparation method and melting temperatures were studied with differential scanning calorimetry（DSC）and wide angle X-ray diffractometry （WAXD）. The results reveal that the β-PP content in the B-nucleated PP/PA6 alloy prepared by adding the nucleating agent at 190 ℃ after the PP/PA 6 alloy melted is higher than that of the alloy prepared from mixing B-nucleated PP and PA 6. Higher melting temperature is beneficial to the transformation of PP in the PP/PA 6 alloy into β-PP.