【摘要】 采用ＤＳＣ法研究了ＨＤＰＥ、ＬＬＤＰＥ及ＥＰＤＭ对ＰＰ等温结晶行为的影响。结果表明，ＰＥ的存在可显著降低ＰＰ的结晶速度，且ＨＤＰＥ比ＬＬＤＰＥ的影响要大，但加入ＥＰＤＭ后有所改善；ＰＥ的存在会诱发ＰＰ生成亚稳态的β晶系，β晶的生成量只与ＰＥ的含量有关，而与种类无关，加入ＥＰＤＭ会阻碍ＰＰβ晶的生成更多还原

【Abstract】 The presence of HDPE, LLDPE and EPDM in the polypropylene matrix affects its isothermal crystallization behavior, which were studied with the help of differential scanning calorimetry (DSC). The results demonstrate that the crystallization rate of polypropylene decreases with adding polyethylene. The effect of addition of HDPE on the crystallization of PP is higher compared to LLDPE. PE will induce PP to form the β crystal form of metastable state. EPDM may effectively improve the phase boundary of PP/PE blends and will hinder forming β crystal form of PP.更多还原