过氧化物交联超高分子量聚乙烯的结构与性能  

Structure and Properties of Peroxide Crosslinked PE-UHMW

作　　者：刘群 钟蔚华[1] 张勇 伊阳 于俊荣[3,4] 王彦[3,4] 诸静[3,4] 胡祖明[3,4] Liu Qun;Zhong Weihua;Zhang Yong;Yi Yang;Yu Junrong;Wang Yan;Zhu Jing;Hu Zuming(China North Industries Group Corporation Institute 53,Jinan 250031,China;Army Armaments Department Military Representative Office in Jinan,Jinan 250031,China;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University,Shanghai 201620,China;College of Materials Science and Engineering,Donghua University,Shanghai 201620,China)

机构地区：[1]中国兵器工业集团第五三研究所,济南250031 [2]陆军装备部装甲兵军事代表局驻济南地区军事代表室,济南250031 [3]东华大学纤维材料改性国家重点实验室,上海201620 [4]东华大学材料科学与工程学院,上海201620

出　　处：《工程塑料应用》2018年第11期48-52,57,共6页Engineering Plastics Application

摘　　要：采用过氧化二异丙苯(DCP)进行引发交联超高分子量聚乙烯(PE-UHMW),采用热压法制备交联PE-UHMW片材。探讨了交联改性前后片材的结构形态,DCP含量对交联PE-UHMW片材的凝胶含量、热稳定性、力学性能和抗蠕变性能的影响。结果表明,PE-UHMW改性后,交联片材与未交联片材相比凝胶含量大幅提高,热稳定性也得到改善。交联PE-UHMW片材的拉伸强度和断裂伸长率均随DCP含量的增加而降低。与未交联片材的蠕变伸长率相比,2%DCP交联PE-UHMW片材的20 min蠕变伸长率降低了78.99%。交联PE-UHMW片材对开发和制备抗蠕变PE-UHMPW制品具有重要的指导意义。The peroxide dicumyl peroxide(DCP)was used to initiate and crosslink ultra-high molecular weight polyethylene(PE-UHMW).Crosslinked PE-UHMW sheet was prepared by the hot-pressing method.The morphological structure of uncrosslinked and crosslinked PE-UHMW sheet,and the effect of DCP content on the gel content,the thermal stability,mechanical properties and creep resistance of crosslinked PE-UHMW sheet were investigated.The results show that the gel content of the crosslinked sheet is substantially higher than that of the un-crosslinked sheet,and thermal stability is also improved.The broken tensile strength and elongation of the crosslinked PE-UHMW sheet decrease with the addition of more DCP content.Compared with the uncrosslinked samples,the 20 min creep elongation of the 2%DCP crosslinked PE-UHMW sheet decreases by 78.99%.It has important guiding significance for the development and preparation of creep-resistant ultra-high molecular weight polyethylene products.

关 键 词：超高分子量聚乙烯 交联 过氧化二异丙苯 抗蠕变 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]