通过紫外辐照在线性低密度聚乙烯(LLDPE)的分子链上引入C=O、C-O和-OH含氧基团,其含量随辐照时间延长而增加.紫外辐照后,LLDPE的晶型和晶面间距未发生变化,但是其熔融温度和结晶度下降.与LLDPE/尼龙66(PA66)复合材料相比,辐照LLDPE/PA66复合材料的分散性和相容性得到显著改善,两相之间的界面粘结力明显提高.随辐照时间延长,辐照LLDPE/PA66复合材料的拉伸强度、弯曲强度和缺口冲击强度提高,在辐照24 h时达到最高值,分别比LLDPE/PA66复合材料提高了20%、13%和330%,辐照LLDPE表现出较好的增韧作用.
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