硅烷接枝交联对MgO/高密度聚乙烯复合材料性能的影响  

Effects of silane grafting and crosslinking on MgO/high density polyethylene composites

作　　者：王会杰[1] 吴大鸣[2] 刘颖[1] 许红[1] 郑秀婷[1] 庄俭[1] 

机构地区：[1]北京化工大学高分子材料加工装备教育部工程研究中心,北京100029 [2]北京化工大学有机无机复合材料国家重点实验室,北京100029

出　　处：《复合材料学报》2017年第1期40-46,共7页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51203010)

摘　　要：采用两步法反应挤出工艺制备硅烷接枝交联MgO/高密度聚乙烯(MgO/HDPE)导热复合材料,研究了硅烷接枝、交联对MgO/HDPE复合材料的结晶性能、力学性能、耐热性、导热性能的影响,并利用FTIR和DSC对其接枝交联、结晶情况进行表征。结果表明,交联MgO/HDPE复合材料的拉伸强度、缺口冲击强度、热变形温度(HDT)分别由未交联时的20.41 MPa、1.875kJ/m^2和74.6℃提升到27.24 MPa、7.875kJ/m^2和83.5℃,并且热导率保持基本不变0.447 W/(m·K)。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.

关 键 词：接枝 交联 聚乙烯 导热 聚合物基复合材料 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]