Mechanism of size effects of a filler on the wear behavior of ultrahigh molecular weight polyethylene

doi:10.1016/j.cjche.2020.03.001

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (7): 1950-1963.DOI: 10.1016/j.cjche.2020.03.001

• Materials and Product Engineering • Previous Articles Next Articles

Mechanism of size effects of a filler on the wear behavior of ultrahigh molecular weight polyethylene

Huan Zhang¹, Shicheng Zhao¹, Zhong Xin¹, Chunlin Ye², Zhi Li², Jincheng Xia², Jiaorong Li¹

1 Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2 State Key Laboratory of Polyolefins and Catalysis, Shanghai Key Laboratory of Catalysis Technology for Polyolefins(Shanghai Research Institute of Chemical Industry), Shanghai 200062, China

Received:2020-02-11 Revised:2020-02-26 Online:2020-08-31 Published:2020-07-28
Contact: Shicheng Zhao, Zhong Xin
Supported by:
This work 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).

Mechanism of size effects of a filler on the wear behavior of ultrahigh molecular weight polyethylene

Huan Zhang¹, Shicheng Zhao¹, Zhong Xin¹, Chunlin Ye², Zhi Li², Jincheng Xia², Jiaorong Li¹

1 Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2 State Key Laboratory of Polyolefins and Catalysis, Shanghai Key Laboratory of Catalysis Technology for Polyolefins(Shanghai Research Institute of Chemical Industry), Shanghai 200062, China

通讯作者: Shicheng Zhao, Zhong Xin
基金资助:
This work 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).

Abstract

Abstract: 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 fillers 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.

Key words: 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 fillers 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.

关键词: Ultrahigh molecular weight polyethylene, Wear behavior, Structure-property relationships, Particle size, Silicon carbide, Polymer-filler interactions

Huan Zhang, Shicheng Zhao, Zhong Xin, Chunlin Ye, Zhi Li, Jincheng Xia, Jiaorong Li. Mechanism of size effects of a filler on the wear behavior of ultrahigh molecular weight polyethylene[J]. Chinese Journal of Chemical Engineering, 2020, 28(7): 1950-1963.

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Mechanism of size effects of a filler on the wear behavior of ultrahigh molecular weight polyethylene

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