文献类型：期刊文献

英文题名：Wear Resistance Mechanism of Ultrahigh-Molecular-Weight Polyethylene Determined from Its Structure-Property Relationships

作者：Zhang, Huan[1];Zhao, Shicheng[1];Xin, Zhong[1];Ye, Chunlin[2];Li, Zhi[2];Xia, Jincheng[2]

机构：[1]East China Univ Sci & Technol, Dept Prod Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Meilong Rd 130, Shanghai 200237, Peoples R China;[2]Shanghai Res Inst Chem Ind, Shanghai Key Lab Catalysis Technol Polyolefins, State Key Lab Polyolefins & Catalysis, Yunlin Rd East 345, Shanghai 200062, Peoples R China

年份：2019

卷号：58

期号：42

起止页码：19519

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20194207535063);WOS:【SCI-EXPANDED(收录号:WOS:000500349200019)】；

基金：This work was financially supported by the Natural Science Foundation of China (Grants 21878089 and 21476085), National Key R&D Program of China (2016YFB0302201), and the Fundamental Research Funds for the Central Universities (222201717025).

语种：英文

外文关键词：Crystallinity - Surface roughness - Wear of materials - Molecular weight - Wear resistance - Crystallite size

摘要：Although it is generally believed that the extraordinarily high molecular weight plays a great role in the excellent wear resistance of ultrahigh-molecular-weight polyethylene (UHMWPE), the mechanism behind this effect remains poorly understood. In this study, we investigated the wear behavior of UHMWPE with respect to its microstructures, measured in terms of its crystallinity, lamellar thickness and crystallite size, entanglement, interphase fractions, and surface roughness. From these structure-property relationships, we conclude that the high wear resistance of UHMWPE can be attributed to its higher degree of entanglement and its high fraction content of interphase domains; the other parameters were either not significant or not relevant. Accordingly, we propose a mechanism in which the more greatly entangled molecular chain networks of UHMWPE protect the surface and subsurface layers from damage under stresses during sliding wear.