文献类型：期刊文献

英文题名：Mechanism of size effects of a filler on the wear behavior of ultrahigh molecular weight polyethylene

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

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai Res Inst Chem Ind, State Key Lab Polyolefins & Catalysis, Shanghai Key Lab Catalysis Technol Polyolefins, Shanghai 200062, Peoples R China

年份：2020

卷号：28

期号：7

起止页码：1950

外文期刊名：CHINESE JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20202408811442);WOS:【SCI-EXPANDED(收录号:WOS:000566748300025)】；

基金：Thiswork was financially supported by the National 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：Ultrahigh molecular weight polyethylene; Wear behavior; Structure-property relationships; Particle size; Silicon carbide; Polymer-filler interactions

摘要：Although the size effects of a filler are closely related to the complex multi-level structures of their polymer composites; unfortunately, such relationships remain poorly understood. In this study, we investigated the effects of various sizes (40-600 nm) of silicon carbide (SiC) fillers on the wear behavior of ultrahigh molecular weight polyethylene (UHMWPE) in the presence of the silane coupling agent KH-560. All of these SiC fillets improved the wear resistance of UHMWPE significantly, with a medium size (150 nm) being optimal. To examine the reasons for this behavior, we analyzed the multi-level structures of the samples in terms of their matrix structures (crystalline; amorphous; interphase), matrix-filler interactions (physical adsorption; chemical crosslinking; hybrid network) and the external effects of SiC fillers (bearing loads; transferring frictional heat). The high rigidity and thermal conductivity of SiC fillers and, more importantly, the intrinsic characteristics of the matrix structures (larger crystal grains; higher interphase; stronger amorphous entangled networks) were the key parameters affecting the enhancement in the wear-resistance of the UHMWPE. Herein, we also provide interpretations of the corresponding physical effects. Our results should improve our understanding of the structure-property relationships and, thus, should guide the formula design of UHMWPE composites. (C) 2020 The Chemical Industry and Engineering Sodety of China, and Chemical Industry Press Co., Ltd. All rights reserved.