Abstract
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.
Highlights
Ultrahigh-molecular-weight polyethylene (UHMWPE) exhibits excellent performance because its molecular weight (MW) is more than 1 million [1]
This study demonstrated that the new manufacturing capabilities for UHMWPE (MW = 7 × 106) tibial insert will be developed further [7]
The present study investigated the relationship between the physical characteristics and tribological performance of UHMWPE of different MWs modified with 15 wt.% Cu(II) chelate of bissalicylaldehyde-ethylenediamine
Summary
Ultrahigh-molecular-weight polyethylene (UHMWPE) exhibits excellent performance because its molecular weight (MW) is more than 1 million [1]. Schiff base copper complex compounds have good thermal stability with decomposition temperatures above 200 °C, and they are biologically active materials that exhibit anti-tumor, antiviral, and antibacterial properties [9]. The present study investigated the relationship between the physical characteristics and tribological performance of UHMWPE of different MWs modified with 15 wt.% Cu(II) chelate of bissalicylaldehyde-ethylenediamine (add). The present study investigated the relationship between the physical characteristics and tribological performance of UHMWPE of different MWs modified with 15 wt.% Cu(II) chelate of bissalicylaldehyde-ethylenediamine (add1) This chelate is a Schiff base copper complex with special tribological characteristics and wear resistance. This study will allow the development of wear-resistant materials of modified UHMWPE for engineering applications
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