Grafted Polyolefin-Coated Synthetic Mica-Filled Polypropylene-co-ethylene Composites: A Study on the Interfacial Morphology and Properties
Grafted Polyolefin-Coated Synthetic Mica-Filled Polypropylene-co-ethylene Composites: A Study on the Interfacial Morphology and Properties
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DOI：
10.1080/00222340903351395
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发表时间：
2010-01
期刊：
影响因子：
--
通讯作者：
Lei Wang;Bang-hu Xie;Wei Yang;Ming‐bo Yang
中科院分区：
文献类型：
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作者：
Lei Wang;Bang-hu Xie;Wei Yang;Ming‐bo Yang
采用提纯的马来酸酐接枝等规聚丙烯（iPP-MA）和马来酸酐接枝聚烯烃弹性体（POE-MA）包覆合成云母，加入到嵌段聚丙烯-乙烯共聚物（cPP）中，制备云母含量为10wt%的复合材料。研究了接枝聚烯烃的种类、含量及配比对复合材料界面形态、力学性能、结晶行为及断裂参数的基本功的影响。结果表明，用接枝聚烯烃包覆合成云母，可有效降低云母表面极性，提高云母与cPP的界面结合力。当接枝聚烯烃占云母质量的3%时，云母的沉降体积最小，复合材料的界面结合力较好。当接枝聚烯烃含量为云母质量的3- 5%时，随着POE-MA含量的增加，云母的沉降体积减小，复合材料的界面结合力提高。接枝聚烯烃的包覆及接枝聚烯烃的组成变化对云母填充复合材料的力学性能和结晶行为影响不大。而接枝聚烯烃涂层使复合材料的比基本断裂功（we）显著增加，比非基本断裂功（βwp）略有下降。在接枝聚烯烃总量一定的情况下，随着POE-MA含量的增加，w减小，βwp略有增加。
Purified maleic anhydride grafted isotactic polypropylene (iPP-MA) and maleic anhydride grafted polyolefin elastomer (POE-MA) were used to coat synthetic mica, which was added to block polypropylene-co-ethylene (cPP) to prepare composites with 10 wt% mica content. The effect of the kinds of grafted polyolefin, their contents and composition ratios on the interfacial morphology, mechanical properties, crystallization behavior, and essential work of fracture parameters for the composites were studied. The results showed that the coating of synthetic mica with grafted polyolefin could effectively lower the surface polarity of the mica and improve the interfacial adhesion between mica and cPP. The sedimentation volume of mica reached a minimum, and the interface adhesion of the composites was comparatively good when the grafted polyolefin was 3 wt% of the weight of the mica. When the content of grafted polyolefin was fixed at 3–5 wt% of the weight of the mica, the sedimentation volume of mica decreased and the interface adhesion of the composites improved with increasing POE-MA content. The coating with grafted polyolefin and the composition change of the grafted polyolefin had little effect on the mechanical properties and crystallization behavior of the mica-filled composites. However, the coating with grafted polyolefin increased the special essential work of fracture (we ) of the composites significantly, whereas the special non-essential work of fracture (βwp ) showed a slight decrease. When the total grafted polyolefin was fixed, the we decreased and the βwp increased a little as the POE-MA content was increased.