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《Acta Materiae Compositae Sinica》 2017-01
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Effects of silane grafting and crosslinking on MgO/high density polyethylene composites

WANG Huijie;WU Daming;LIU Ying;XU Hong;ZHENG Xiuting;ZHUANG Jian;Engineering Research Center for Polymer Processing Equipment,Ministry of Education,Beijing University of Chemical Technology;State key laboratory of Organic and Inorganic Composite Materials,Beijing University of Chemical Technology;  
The silane grafting and crosslinking high density polyethylene(HDPE)filled with MgO was prepared by the method of two-step reaction-extrusion,in order to study the effects of the silane grafting and crosslinking on the crystallinity,the mechanical properties,the heat resistance,and the thermal conductivity of the MgO/HDPE composites.And the graft-crosslinking and the crystallization were characterized by FTIR and DSC,respectively.The results show that the tensile strength,the notched impact strength and the heat deflection temperature(HDT)of the MgO/HDPE composites increase from 20.41 MPa,1.875kJ/m~2 and 74.6 ℃ without graft-crosslinking to 27.24 MPa,7.875kJ/m~2 and 83.5℃respectively after crosslinking,and the thermal conductivity of the crosslinking composites(0.447 W/(m·K))is almost the same with the non-crosslinking ones.
【Key Words】: grafting crosslinking polyethylene thermal conductivity polymer-matrix composites mechanical properties
【Fund】: 国家自然科学基金(51203010)
【CateGory Index】: TQ325.12;TB332
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