Abstract: The nucleating effects of α and β nucleating agent on the crystallization behavior of polypropylene(PP) were studied by differential scanning calorimetry(DSC) and X-ray diffraction spectrum(XRD).The results shows that the addition of nucleating agents increased the onset temperature and peak temperature and improved crystallization rate of PP.With the addition of α nucleating agent,the crystallinity increased,resulted in higher rigidity and lower impact strength than those of pure PP;while with the addition...