作者:李琳 ，陈孟杨 ，刘贺千 ，杨旭 ，赵洪
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Authors:LI Lin ,CHEN Meng-yang ,LIU He-qian ,YANG Xu ,ZHAO Hong
摘要:摘要:针对聚丙烯绝缘电力电缆绝缘材料中，聚丙烯基体与弹性体分散相两者不相容导致的弹性体分散性差的问题，依据相似相容理论，通过紫外光辐照接枝技术将聚丙烯基体接枝马来酸酐，增加了基体相的极性，从而使弹性体在聚丙烯基体的分散性获得显著提升，并使接枝改性后复合材料的弹性模量得到降低，提升了材料韧性。紫外光辐照接枝技术可以通过调控辐照剂量，有效调控接枝率并避免材料在接枝过程中发生降解。同时，接枝改性提升了聚丙烯基体材料的击穿强度，与弹性体分散性提升协同增加了接枝改性复合材料的击穿强度，降低了复合材料的损耗因数。
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Abstract:Abstract: In view of the poor dispersion of the elastomer caused by the incompatibility between the polypropylene matrix and the elastomer dispersion phase in the polypropylene insulated power cable insulation materials， according to the similarity compatibility theory， the polypropylene matrix was grafted with maleic anhydride through the UV irradiation grafting technology， which increased the polarity of the matrix phase， so that the dispersion of the elastomer in the polypropylene matrix was significantly improved. The elastic modulus of the grafted composite was reduced and the toughness of the composite was improved. UV irradiation grafting technology can effectively control the grafting rate and avoid the degradation of materials during the grafting process by adjusting the irradiation dose. At the same time， the grafting modification improves the breakdown strength of the polypropylene matrix material， and cooperates with the improvement of the dispersion of the elastomer to increase the breakdown strength of the grafting modified composite material， reducing the loss factor of the composite material.

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