通过红外光谱分析、与水的接触角测定、力学性能测定,研究了空气中不同环境温度下紫外线辐照对高密度聚乙烯(HDPE)结构与性能的影响以及紫外辐照官能化HDPE对HDPE/聚乙烯醇(PVA)纤维体系的增容作用.实验结果表明,紫外辐照后,HDPE分子链上引入了-C(C=O)CH3,-CH2C(=O)CH2-,-C(=O)O-等含氧官能团,实现了HDPE的官能化.提高环境温度可提高HDPE官能化速度.紫外辐照后,HDPE的杨氏模量和拉伸屈服强度提高,但断裂伸长率和缺口冲击强度下降.官能化HDPE对HDPE/PVA纤维共混体系有增容作用,增容后的共混物的拉伸屈服强度提高和缺口冲击强度得到提高.
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