| 聚乙烯材料耐慢速裂纹扩展性能与微观结构相关性研究进展 |
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| 引用本文： | 杨波,左晓锋,王志刚,何建军,黄国家,何嘉平.聚乙烯材料耐慢速裂纹扩展性能与微观结构相关性研究进展[J].中国塑料,2019,33(11):91-98. |
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| 作者姓名： | 杨波 左晓锋 王志刚 何建军 黄国家 何嘉平 |
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| 作者单位： | 1. 广州特种承压设备检测研究院
2. 长沙理工大学能动学院 |
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| 基金项目： | 广东省质量技术监督局科技项目;广东省质量技术监督局科技项目 |
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| 摘 要： | 从微观层面讨论了系带分子链的数量、相对分子质量及其分布、短支链含量及其分布和片晶厚度等单个与多个微观结构参数与聚乙烯（PE）材料耐慢速裂纹扩展（SCG）的相关性。结果表明，对单个微观结构参数来说，相对分子质量及其分布、短支链含量及分布与PE管材的耐SCG性能之间有更加明显的相关性；对多个微观结构参数组成的结构参数，能够很好地测量PE的耐SCG性能。
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| 关 键 词： | 聚乙烯管材 耐慢速裂纹扩展 微观结构 系带分子 相对分子质量及其分布 |
| 收稿时间： | 2019-05-20 |
Research Progress in Relationship Between Resistance of Slow Crack Growth and Microstructure of Polyethylene |
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| YANG Bo,ZUO Xiaofeng,WANG Zhigang,HE Jianjun,HUANG Guojia,HE Jiaping.Research Progress in Relationship Between Resistance of Slow Crack Growth and Microstructure of Polyethylene[J].China Plastics,2019,33(11):91-98. |
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| Authors: | YANG Bo ZUO Xiaofeng WANG Zhigang HE Jianjun HUANG Guojia HE Jiaping |
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| Affiliation: | 1.Guangzhou Special Pressure Equipment Inspection And Research Institute,Guangzhou 510663,China；2.College of Activation,Changsha University of Science&Technology,Changsha 410114,China |
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| Abstract: | In this paper, we analyzed the correlation between the slow crack propagation of PE and the single/multiple microstructural parameters including the number of molecular chains, molecular weight and distribution, content and distribution of short-chain molecules, and lamella thickness. Many studies indicated that the molecular weight and its distribution, content and distribution of short-branched chains exhibited a more significant correlation with the SCG resistance of PE pipes than other single microstructural parameters. The SCG resistance of PE pipes could be well measured with the structural parameters consisting of the multiple microstructural parameters. |
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| Keywords: | polyethylene pipe slow crack growth resistance microstructure tie molecule molecular weight and distribution |
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