应用化学2026，Vol.43Issue(4)：614-616,中插11-中插14,7.DOI:10.19894/j.issn.1000-0518.260088
基于应变硬化模量的聚乙烯耐慢速裂纹增长性能与热分级表征关系探讨
Relationship Between Slow Crack Growth Resistance Performance and Thermal Fractionation Characterization of Polyethylene Based on Strain Hardening Modulus
摘要
Abstract
The slow crack growth resistance of four polyethylene pipe materials was characterized by strain hardening modulus,successive self-nucleation and annealing fractionation(SSA),and temperature rising elution fractionation(TREF).The correlation between strain hardening modulus and thermal fractionation was investigated.The strain hardening modulus of polyethylene can effectively reflect the performance of the raw material in resisting slow crack growth.The strain hardening modulus of PE100-RC grade is the highest,while that of PE80 grade is the lowest.The results of SSA and TREF show consistency.SSA is within 135℃,and TREF is within the range of 90～105℃,the grade content is positively correlated with the strain hardening modulus of the polyethylene pipe material special grade.The slow crack growth resistance of the polyethylene pipe materials can be qualitatively assessed by the content of high-temperature crystalline fractions obtained from both methods.The SSA method offers advantages in terms of equipment,test cycle of 4 hours,sample consumption,and environmental friendliness.关键词
聚乙烯/管材专用料/耐慢速裂纹扩展/应变硬化模量/热分级Key words
Polyethylene/Resin material for pipe/Slow crack growth resistance/Strain hardening modulus/Thermal fractionation分类
化学化工引用本文复制引用
李玉娥,徐渝,郭若海,张伟..基于应变硬化模量的聚乙烯耐慢速裂纹增长性能与热分级表征关系探讨[J].应用化学,2026,43(4):614-616,中插11-中插14,7.基金项目
中国石化项目(No.722014)资助 Supported by China Petroleum & Chemical Corporation Project(No.722014) （No.722014）
