结构因素对聚乙烯管材慢速裂纹扩展影响的研究进展  

Progress in Influence of Structural Factors on Slow Crack Growth of Polyethylene Pipes

作　　者：刘晓播 张乐康 毕新平 康树峰 李景庆[2] 王友健 田冠楠 蒋世春[2] LIU Xiao-bo;ZHANG Le-kang;BI Xin-ping;KANG Shu-feng;LI Jing-qing;WANG You-jian;TIAN Guan-nan;JIANG Shi-chun(Shenzhen Woer Heat-Shrinkable Material Co,Ltd,Shenzhen 518118,China;School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China;Shandong Orient Hongye Chemical Co,Ltd,Weifang 262700,China)

机构地区：[1]深圳市沃尔核材股份有限公司,深圳518118 [2]天津大学材料学院,天津300072 [3]山东东方宏业化工有限公司,潍坊262700

出　　处：《高分子通报》2021年第10期21-30,共10页Polymer Bulletin

摘　　要：聚乙烯管材树脂在燃气管或给排水管方面广泛应用,而慢速裂纹扩展(slow crack growth, SCG)性能是评价树脂优劣的一项重要指标,也是准确预测管道服役寿命的重要依据。本文概述了聚乙烯管材树脂的结构因素,主要包括分子量及其分布、共单体含量及其分布、系带分子数量、片晶厚度对慢速裂纹扩展行为的影响。一般来说,增加分子量及其分布宽度、提高共单体含量都有利于耐慢速裂纹扩展性能的提高,而系带分子数量和片晶厚度又受分子量及其分布和共单体含量及其分布的影响。通过总结近期的研究进展,试图为工业界在提升耐慢速裂纹扩展性能方面提供借鉴,并就结构因素对聚乙烯管材慢速裂纹扩展影响研究的未来发展趋势进行展望。Polyethylene pipe resins are widely used in gas or water transportation pipes, and slow crack growth(SCG) performance is an important index for evaluating the quality of resins, and it is also an important basis for accurately predicting the service lifetime of pipelines. This article summarizes the structural factors of polyethylene pipe resin, including the influence of molecular weight and its distribution, comonomer content and its distribution, number of tie molecules, and lamella thickness on the slow crack growth behavior. Generally, increasing the molecular weight and its distribution, and the comonomer content are all effective to improve the slow crack growth resistance. The number of tie molecules and the lamella thickness are affected by the molecular weight and its distribution, the comonomer content and its distribution. By summarizing the recent research progress, it tries to provide some suggestion to industry in improving the performance of slow crack growth resistance. It also looks forward to the future development trend of the research on the influence of structural factors on the slow crack growth of polyethylene pipes.

关 键 词：聚乙烯管材 慢速裂纹扩展 结构因素 分子量及其分布 系带分子 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]