应用化学2025，Vol.42Issue(1)：58-68,中插1-中插2,13.DOI:10.19894/j.issn.1000-0518.240175
缠结度对超高相对分子质量聚乙烯凝聚态结构和冲击强度的影响
Effect of Entanglement Degree on Condensed State Structure and Impact Strength of Ultra-High Relative Molecular Mass Polyethylene
摘要
Abstract
A disentangled ultra-high relative molecular mass polyethylene(UHMWPE)together with 11 commercial samples were systematically studied to investigate the influence of entanglement on the condensed state structure and to correlate the condensed state structure of UHMWPE to its impact strength.It was found that with the increase of entanglement degree the crystallization activation energy decreases at first and then grows rapidly,while the degree of crystallinity is not influenced greatly.The long spacing period of UHMWPE behavior the same trend of crystallization activation energy with the growth of entanglement degree.High degree of melt entanglement will promote UHMWPE to have thick lamellar stacking structure.Finally,by correlating the condensed state structure with the impact strength,it is discovered that there is a strong linear correlation between the impact strength and the thickness of the amorphous phase with a goodness of fit up to 0.94.The impact strength of UHMWPE can be improved by reducing the thickness of the amorphous region.关键词
超高相对分子质量聚乙烯/分子链缠结/长周期/凝聚态结构/冲击强度Key words
Ultra-high molecular mass polyethylene/Entanglement/Long spacing period/Condensed state structure/Izod notched impact strength分类
化学化工引用本文复制引用
宋新月,胡本旻,孟帅,石恒冲,施德安,王兆阳,杨华伟,栾世方..缠结度对超高相对分子质量聚乙烯凝聚态结构和冲击强度的影响[J].应用化学,2025,42(1):58-68,中插1-中插2,13.基金项目
国家重点研发计划项目(No.2020YFC1106903)和中国科学院威高计划(No.2023QT03)资助 Supported by the National Key Research and Development Program of China(No.2020YFC1106903)and the Weigao Plan of Chinese Academy of Sciences(No.2023QT03) （No.2020YFC1106903）
