The influence of injection molding on tribological characteristics of ultra-high molecular weight polyethylene under dry sliding

Wear ◽  
2010 ◽  
Vol 268 (5-6) ◽  
pp. 803-810 ◽  
Author(s):  
Hsien-Chang Kuo ◽  
Ming-Chang Jeng
Keyword(s):  
Molecular Weight ◽  
Injection Molding ◽  
High Molecular Weight ◽  
Tribological Characteristics ◽  
Dry Sliding ◽  
Ultra High Molecular Weight

Tribomechanical Properties of Polymeric Composites Based on Mixture of Ultra High Molecular Weight Polyethylene and Polyamide

2015 ◽  
Vol 770 ◽  
pp. 87-92
Author(s):  
Sergey Panin ◽  
Lyudmila А. Kornienko ◽  
Nguyen Xuan Thuc ◽  
Larisa R. Ivanova ◽  
Mikhail A. Poltaranin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Block Copolymer ◽  
High Molecular Weight ◽  
Sliding Friction ◽  
Polymeric Composites ◽  
Flow Index ◽  
Dry Sliding ◽  
Dry Sliding Friction ◽  
Ultra High Molecular Weight

In order to find out optimum filler to increase manufacturability (extrudability) of composites based on ultra-high molecular weight polyethylene (UHMWPE) matrix as well as to develop polymer-polymeric composites with improved tribological characteristics, the structure, mechanical properties and wear resistance of UHMWPE mixtures with elasticizing block-copolymer PA-b-LLDPE (UHMWPE + PA-b-LLDPE) was investigated under dry sliding friction. Applied aspect of the study is related to the selection of commercially available fillers being compatible with UHMWPE for manufacturing anti-frictional extrudable nanocomposites. It is shown that as compared with pure UHMWPE mechanical properties (ultimate strength, value of elongation at failure) do not vary substantially, but the wear rate under dry sliding friction of polymeric composites UHMWPE + n wt.% PA-b-LLDPE is reduced only when block copolymer weight fraction is less than ≤ 5 wt.%. By the polymeric filling an important technological characteristic - specific pressure of extrusion (that is proportional to melt flow index) might be decreased. Permolecular structure and wear track surfaces of polymer-polymer composites UHMWPE + n wt.% PA-b-LLDPE was examined and numerically characterized.

S0202-2-2 Influence of surface roughness on tribological characteristics of ultra-high molecular weight polyethylene

2009 ◽  
Vol 2009.5 (0) ◽  
pp. 47-48
Author(s):  
Yoshitaka NAKANISHI ◽  
Mutsumi TOUGE ◽  
Hidehiko HIGAKI ◽  
Ken SHIMOTO ◽  
Akihisa KUGOTA ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Surface Roughness ◽  
High Molecular Weight ◽  
Tribological Characteristics ◽  
Ultra High Molecular Weight

Tribotechnical Properties of HA Nanocomposite Based on UHMWPE under Dry Sliding and Lubrication

2014 ◽  
Vol 1040 ◽  
pp. 208-212
Author(s):  
Narongrit Sonjaitham ◽  
Noppanuch Puangmalee
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Wear Intensity ◽  
Dry Sliding ◽  
Distilled Water ◽  
Tribotechnical Properties ◽  
Permolecular Structure ◽  
Ultra High Molecular Weight ◽  
Spherulitic Structure

The tribotechnical properties of hydroxyapatite (HA) nanocomposite based on ultra-high molecular weight polyethylene (UHMWPE) under dry sliding and lubrication of distilled water and plasma blood was investigated with block-on-ring. It was shown that modification of UHMWPE by HA nanoparticles within range of 0.1–0.5 wt.% results in decrease of wear intensity at dry sliding up to 3 times. The under lubrication, wear intensity of pure UHMWPE and nanocomposite are deceased up to 50–70% as compared with under dry sliding. Permolecular structure of pure UHMWPE and nanocomposite are spherulitic structure, which nanoparticle does not alter the nature of the permolecular structure, and homogeneously dispersed in the UHMWPE matrix.

Tribotechnical Properties of UHMWPE Based Composite Filled with HA Microparticles under Dry Sliding and Lubrication

2014 ◽  
Vol 1040 ◽  
pp. 213-217 ◽  
Author(s):  
Narongrit Sonjaitham ◽  
Noppanuch Puangmalee
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Wear Intensity ◽  
Dry Sliding ◽  
Distilled Water ◽  
Tribotechnical Properties ◽  
Permolecular Structure ◽  
Ultra High Molecular Weight ◽  
Spherulitic Structure

The tribotechnical properties of ultra-high molecular weight polyethylene (UHMWPE) based composite filled with hydroxyapatite (HA) microparticles under dry sliding and lubrication of distilled water and plasma blood wear investigated with block-on-ring. It was shown that modification of UHMWPE by HA microparticles of 20 wt.% results in decrease of wear intensity at dry sliding up to 4 times. The under lubrication, wear intensity of pure UHMWPE and microcomposite are deceased up to 50–70% as compared with under dry sliding. Permolecular structure of pure UHMWPE and microcomposite are spherulitic structure and the HA microparticles were dispersed in the UHMWPE matrix.

scholarly journals The Features of Rheological and Tribological Behavior of High-Viscosity Polyolefine Compositions Depending on Their Content

2021 ◽  
Vol 15 (4) ◽  
pp. 486-492
Author(s):  
Mykhailo Bratychak Jr ◽  
◽  
Victoria Zemke ◽  
Natalia Chopyk ◽  
◽  
...  
Keyword(s):  
Molecular Weight ◽  
Friction Coefficient ◽  
Injection Molding ◽  
Polymer Blends ◽  
High Molecular Weight ◽  
Tribological Behavior ◽  
High Viscosity ◽  
Energy Costs ◽  
Technological Properties ◽  
Ultra High Molecular Weight

The influence of additive nature as well as its ratio on the rheological, tribological and technological properties of blends based on ultra-high molecular weight polyethylene has been determined. The energy costs impact in the polymer blends processing has been studied. It is shown that the rheological and tribological properties of the samples have a complicated dependence, which is determined by inhomogeneity of the system. The paper takes into consideration the influence of the friction coefficient of material and the viscosity of its melt on energy costs during processing by injection molding or extrusion

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