γ射线辐照高密度聚乙烯/氧化铝共混体系的力学性能及导热性能  

A STUDY ON THE MECHANICAL AND THERMAL CONDUCTIVE PROPERTIES OF GAMMA RAY IRRADIATED HDPE/Al_2O_3 BLEND

作　　者：刘道龙[1] 刘鹏波[1] 徐闻[1] 罗利琴[1] 

机构地区：[1]高分子材料工程国家重点实验室四川大学高分子研究所,四川成都610065

出　　处：《高分子材料科学与工程》2005年第6期170-173,共4页Polymer Materials Science & Engineering

基　　金：国家重点基础研究专项经费资助项目(G1999064809)

摘　　要：HDPE经过γ射线辐照后,其分子链上引入了羰基等含氧极性基团,极性提高。通过在HDPE/氧化铝(A l2O3)体系中加入辐照HDPE以及协同增容剂(Synerg ist),体系的界面相互作用增强,力学性能明显提高。由于A l2O3具有优良的导热性能,因此,HDPE/A l2O3的热导率明显提高。研究结果表明,与HDPE相比,V(HDPE)/V(-γHDPE)/V(2%Synerg ist处理A l2O3)=56/14/30体系的拉伸强度从26.3M Pa提高到32.4 M Pa,冲击强度从23.2 kJ/m2提高到35.9 kJ/m2;此时,体系的导热系数由0.46 W/(m.K)增加到1.14 W/(m.K)。Some oxygen containing groups （mainly C=O group） are introduced on the molecular chain of HDPE during gamma ray irradiation in air. The affinity between HDPE and Al2O3 are improved owing to the polar groups introduced. By the addition of synergist, the interracial adhesion between irradiated HDPE （γ-HDPE） and t-STC（treated with 2% synergist） is further improved, the mechanical properties of HDPE/γ-HDPE/t-Al2O3 blend are improved quite a lot. With the increase of Al2O3 content in the HDPE matrix, the thermal conductivity of the blend is improved, which is attributed to the high thermal conductivity of Al2O3 fillers.

关 键 词：高密度聚乙烯 Γ射线辐照 氧化铝 导热系数 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]