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采用差示扫描量热法(DSC)和偏光显微镜(POM)研究了聚丙烯(PP)/三元乙丙橡胶(EPDM)/煤泥复合材料的非等温结晶行为。通过Jeziorny法、Ozawa法和莫志深法分别对非等温结晶过程进行研究,并用Kissinger法和Takhor法得到迁移活化能。结果表明:煤泥的加入影响了结晶过程中链段的扩散、排列,使结晶速率变慢。当煤泥含量为10%(wt,质量分数,下同)时,煤泥被EPDM包覆后分布在PP中,而当煤泥含量增多时,大部分煤泥直接分散在PP中。分散状态的煤泥在结晶过程中起到了成核剂的作用。当煤泥含量为20%时,复合材料的迁移活化能最低,达到168.48kJ。
The non-isothermal crystallization behavior of polypropylene (PP) / EPDM / SLM composites was investigated by differential scanning calorimetry (DSC) and polarizing microscope (POM). The non-isothermal crystallization process was studied respectively by Jeziorny method, Ozawa method and Morgesim method, and the activation energy of migration was obtained by Kissinger method and Takhor method. The results show that the addition of slime affects the diffusion and alignment of the segments in the crystallization process, which slows down the crystallization rate. When the content of slime is 10% (wt, mass fraction), the slime is covered by EPDM and distributed in PP. When slime content increases, most slime disperses directly in PP. Particulate slime serves as nucleating agent in the crystallization process. When the slime content is 20%, the migration activation energy of the composite is the lowest, reaching 168.48kJ.