聚乙烯管材专用料耐高温水浴老化性能研究  

Research on High Temperature Water Bath Aging Resistance ofSpecial Material for Polyethylene Pipe

作　　者：高蔓彤 刘德俊 刘亚明 张阿昱[1,2,3] 鲜林云 Gao Mantong;Liu Dejun;Liu Yaming;Zhang Ayu;Xian Linyun(Chinese National Engineering Research Center for Petroleum and Natural Gas Tubular Goods Co.,Ltd.,Xi’an,Shaanxi,710018;CNPC Baoji Petroleum Steel Pipe Co.,Ltd.,Baoji,Shaanxi,721008;Shaanxi Province Key Laboratory of High Performance Coiled Tubing,Baoji,Shaanxi,721008)

机构地区：[1]中油国家石油天然气管材工程技术研究中心有限公司,陕西西安710018 [2]中国石油宝鸡石油钢管有限责任公司,陕西宝鸡721008 [3]陕西省高性能连续管重点实验室,陕西宝鸡721008

出　　处：《现代塑料加工应用》2024年第1期8-10,26,共4页Modern Plastics Processing and Applications

基　　金：中国石油集团公司重大科技专项(2020E-2801J)。

摘　　要：以3种聚乙烯(PE)管材专用料(PEX-1,PE100,PERT-I)为研究对象,在95℃下进行水浴老化试验,通过差示扫描量热仪(DSC)、维卡软化温度测定仪、万能试验机研究了其耐热氧老化性能、热变形行为和拉伸性能。结果表明:在95℃下水浴老化1 440 h后,3个样品中,PERT-I的结晶度变化率最小(2.16%),氧化诱导时间(OIT)变化率最小(2.70%),维卡软化温度变化率最小(0.28%),表现出优异的耐热氧老化性能和热变形性能,同时,PERT-I的拉伸强度变化率和屈服强度变化率分别为15.06%,15.16%,可作为耐高温PE管材内衬层的备选材料。Three types of special material for polyethylene(PE)pipe(PEX-1,PE100,PERT-I)were used as research objects to conduct water bath aging tests at 95℃.Their thermal-oxydative aging property,thermal deformation behavior and tensile strength were studied using differential scanning calorimeter(DSC),Vicat softening temperature tester,and universal testing machine.The results show that after being aged in a water bath at 95℃for 1440 h,among the three samples,PERT-I has the smallest change in crystallinity(2.16%),the smallest change in oxidation induction time(OIT)(2.70%)and the smallest change in Vicat softening point temperature(0.28%),showing excellent heat and oxygen aging properties and thermal deformation properties.At the same time,the tensile strength change rate and yield strength change rate of PERT-I are 15.06%and 15.16%respectively,It can be used as an alternative material for the inner lining of high-temperature resistant PE pipes.

关 键 词：聚乙烯 水浴老化 耐热氧老化性能 热变形行为 拉伸性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]