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首页> 外文期刊>Journal of Applied Polymer Science >Changes in morphology and properties by grafting reaction in PP/EOR/CaCO3 ternary composites
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Changes in morphology and properties by grafting reaction in PP/EOR/CaCO3 ternary composites

机译：PP / EOR / CaCO3三元复合材料中接枝反应的形貌和性能变化

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摘要

The phase morphology and mechanical properties of polypropylene (PP) composites containing ethylene-octene elastomer (EOR) and calcium carbonate (CaCO3) filler were investigated by comparing the toughening effect of unmodified EOR with EOR grafted with maleic anhydride (EOR-MA). EORs of various MA contents were prepared by free-radical grafting of MA onto the EOR backbone using a reactive extrusion process. The composite morphology was directly explored by scanning electron microscopy technique and indirectly explored by differential scanning calorimetry and dynamic mechanical analysis. Separate dispersion of the elastomer and filler particles was achieved by using unmodified EOR. Modification of EOR by maleic anhydride grafting resulted in encapsulation of the filler particles. The mechanical properties of the composites were found to depend mainly on composite morphology and composition and, to a lesser degree, on maleic anhydride concentration. The results of this study showed that when composites contained an equal or higher amount of elastomer relative to filler, a composite with a separate dispersion structure was preferred. (C) 2003 Wiley Periodicals, Inc. [References: 17]
机译：通过比较未改性的EOR和接枝马来酸酐的EOR的增韧作用，研究了含有乙烯-辛烯弹性体（EOR）和碳酸钙（CaCO3）填料的聚丙烯（PP）复合材料的相形态和力学性能。通过使用反应挤出工艺将MA自由基接枝到EOR骨架上来制备各种MA含量的EOR。通过扫描电子显微镜技术直接探索复合物的形态，通过差示扫描量热法和动态力学分析间接探索复合物的形态。通过使用未改性的EOR，可实现弹性体和填料颗粒的独立分散。通过马来酸酐接枝对EOR的改性导致填料颗粒的包封。发现复合材料的机械性能主要取决于复合材料的形态和组成，并且在较小程度上取决于马来酸酐的浓度。这项研究的结果表明，当复合材料相对于填料包含相等或更高数量的弹性体时，具有单独分散结构的复合材料是优选的。 （C）2003 Wiley Periodicals，Inc. [参考：17]

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