溶胶对辐射交联高密度聚乙烯的熔融行为及非等温结晶动力学的影响  

THE INFLUNCE OF SOL ON THE BEHAVIOR OF MELTING AND NONISOTHERMAL CRYSTALLIZATION KINETIC OF RADIATION CROSS-LINKING HDPE

作　　者：邓鹏炀[1] 谢鸿峰[1] 邓明霄[1] 钟晓光[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022

出　　处：《辐射研究与辐射工艺学报》2000年第2期148-153,共6页Journal of Radiation Research and Radiation Processing

摘　　要：通过差示扫描热分析对辐射交联高密度聚乙烯的纯溶胶、纯凝胶及溶凝胶混合体系的熔融和非等温结晶动力学行为进行了研究。结果表明，在相同辐射剂量下，含有溶胶的试样的熔点及结晶峰温均高于纯凝胶试样。含有溶胶的试样，其Avrami指数基本上高于相应的纯凝胶的Avrami指数，且前者的数值更接近原始高密度聚乙烯。因此，溶胶的存在与否，对辐射交联高密度聚乙烯的熔融行为及非等温结晶动力学有很大的影响。By using DSC, the behavior of second melting and nonisothermal crystallization of pure gel pure sol and sol - gel blend of radiation crosslinking HDPE was studied. We found that, because of the existence of sol, there is notable difference between pure gel and pure sol or sol - gel blend. Under the same dose, the melting point and crystallization temperature of pure sol and sol - gel blend are higher than that of pure gel. At the same tin1e, we also found that the Avrand exponent of original PE . pure sol and sol - gel blend is the similar to cach other and different to that of pure gel, which means that the procedure of nucleation and growth of these samples is the same and also different to that of pure gel.

关 键 词：辐射交联 聚乙烯 熔融 非等温结晶动力学 溶胶 

分 类 号：O632.12[理学—高分子化学] O631.34[理学—化学]