【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)。更多还原

【Abstract】 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 interfacial 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.更多还原