Abstract
Reciprocating friction and wear performances of pure ultrahigh-molecular-weight polyethylenes (UHMWPEs) with molecular weights (MWs) of 2, 3, 5, and 9 million and their modified UHMWPEs with 15 wt.% Cu(II) chelate of bissalicylaldehyde-ethylenediamine (add1) against titanium alloy (Ti6Al4V) were investigated under boundary lubrication with 25 vol.% calf serum deionized water solution. Differential scanning calorimetry (DSC) of purchased UHMWPE powders was performed. The enthalpy changed with an increase in MW. UH300 had the lowest temperature of an extrapolated peak and the best peak symmetry in DSC analysis. The friction coefficient curves of molded pure and modified UHMWPEs/Ti6Al4V were compared, and the volume loss by the wear of polymers was measured. 3D topographies of the worn surfaces of polymers and images of the worn surfaces of polymers and titanium alloy against polymers were analyzed by confocal white light microscopy and scanning electron microscopy, respectively. Results showed that the influence of MW of UHMWPE was obvious on the friction and wear characteristics of pure UHMWPEs and 15% add1 UHMWPEs. An MW of 3 million was the best to reduce the friction of rubbing pairs, enhance the wear resistance of pure UHMWPEs and 15% add1-UHMWPEs, and improve the mating properties of Ti6Al4V.
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Min LIU. She received her bachelor degree in chemical engineering and technology in 2014 from Hubei Institute for Nationalities, Enshi, China. Now, she is a postgraduate student in organic chemistry from Wuhan Institute of Technology, Wuhan, China. Her research interests include organic synthesis and design of modified UHMWPE.
Li WU. She received her M.S. degree in organic chemistry from Central China Normal University in 1996, Wuhan, China and her Ph.D. degree in machinery theory and design from China Academy of Machinery Science & Technology in 2010, Beijng, China. She joined the School of Chemical Engineering and Pharmacy and the School of Chemistry and Environmental Engineering at Wuhan Institute of Technology from 1997 and 2014 respectively. Her current position is a professor. Her research areas cover the additives for modified UHMWPE and lubricant.
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Liu, M., Wu, L., Zhang, F. et al. Influence of molecular weight of modified ultrahigh-molecular-weight polyethylene with Cu(II) chelate of bissalicylaldehydeethylenediamine on wear-resistant materials. Friction 4, 116–123 (2016). https://doi.org/10.1007/s40544-016-0108-8
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DOI: https://doi.org/10.1007/s40544-016-0108-8