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Polyurethanes used in the endoprosthesis of joints

100%
Domańska A., Boczkowska A., Izydorzak M., Jaegermann Z., Kurzydłowski K.
Polish Journal of Chemical Technology
|
2010
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vol. 12
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issue 3
10-14
EN
The aim of the studies presented in this paper was the selection of the polyurethanes synthesized from different substrates in order to obtain i) ceramic - biodegradable polymer composite and ii) polyurethane resistant to abrasive wear. The polyurethanes were obtained from the crystalline prepolymers extended by water, because it may have a beneficial effect on the toxicity of the material. The properties of PUs were investigated using infrared spectroscopy, thermogravimetry, differential scanning calorimetry and scanning electron microscopy. In all the tested polyurethanes the peak from the reactive -NCO groups was not observed, which indicates that all the substrates are fully reacted. Such polyurethanes are characterized by interesting properties with the perspective use as components of ceramic-polymer joints endoprosthesis. The designed endoprosthesis should fulfill at least three functions: load bearing function (ceramic core), fastening and stabilizing endoprosthesis to the bone (composite ceramics - biodegradable polymer) and tribologic function allowing mating with parts of the prosthesis (polyurethane layer resistant to abrasive wear).
2
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The Synergy of Fatigue, Corrosion and Abrasive Wear Processes in Operation of Mining Round Link Chains

88%
Remiorz E., Mikuła S., Remiorz E., Mikuła S.
Archives of Mining Sciences
|
2021
|
vol. 66
|
issue 1
3
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Abrasive-wear Resistance of Austenitic Cast Iron

75%
Medyński D., Janus A.
Archives of Foundry Engineering
|
2018
|
issue 3
4
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Microstructure and Abrasive Wear Resistance of 18Cr-4Ni-2.5Mo Cast Steel

75%
Kalandyk B.
Archives of Foundry Engineering
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2012
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issue 4
5
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Polyurethanes from the crystalline prepolymers resistant to abrasive wear

75%
Domańska A., Boczkowska A., Izydorzak-Woźniak M., Jaegermann Z., Grądzka-Dahlke M.
Polish Journal of Chemical Technology
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2014
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vol. 16
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issue 4
14-20
EN
The research aimed at the selection of polyurethanes synthesized from poly(tetramethylene ether) glycol (PTMEG), as well as from two different isocyanates 4,4′-methylenebis(cyclohexyl)isocyanate (HMDI) and 4.4′-methylenebis(phenyl isocyanate) (MDI) in order to obtain polyurethane with increased resistance to abrasive wear and degradation for bio-medical application. Polyurethanes were fabricated from crystalline prepolymers extended by water. The paper presents preliminary results on polyurethane surface wettability, friction coefficient for different couples of the co-working materials such as polyurethane-polyurethane, polyurethane-titanium alloy, polyurethane-alumina, in comparison to commonly used polyethylene-titanium alloy. Shear strength of polyurethane-alumina joint, as well as viscosity of prepolymers were also measured. The values of friction coefficient were compared to literature data on commercially available polyurethane with the trade name Pellethane. Polyurethanes obtained are characterized by low abrasive wear and low friction coefficient in couple with the titanium alloy, what makes them attractive as possible components of ceramic-polymer endoprosthesis joints.
6
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The Influence of Graphite Addition on the Abrasive Wear of AlMg10 Alloy Matrix Composites Reinforced with SiC Particles

75%
Konopka Z., Łągiewka M.
Archives of Foundry Engineering
|
2014
|
issue 3
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