Self-assembly behavior of ultra-high molecular weight in-situ anionically synthesized polymer matrix composite materials “grafted from” single- or multi-wall CNTs

Polymer ◽  
2021 ◽  
Vol 235 ◽  
pp. 124243
Author(s):  
Evangelos Kasapis ◽  
Konstantina Tsitoni ◽  
Gkreti-Maria Manesi ◽  
Ioannis Moutsios ◽  
Dimitrios Moschovas ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Composite Materials ◽  
High Molecular Weight ◽  
Matrix Composite ◽  
Polymer Matrix ◽  
Self Assembly ◽  
Polymer Matrix Composite ◽  
Assembly Behavior ◽  
Ultra High Molecular Weight

Development of Composite Materials Based on Ultrahigh-Molecular Weight Polyethylene and Thermally Expanded Graphite

2019 ◽  
Vol 945 ◽  
pp. 374-378
Author(s):  
O.V. Gogoleva
Keyword(s):  
Molecular Weight ◽  
Composite Materials ◽  
High Molecular Weight ◽  
Polymer Composite ◽  
Polymer Matrix ◽  
Expanded Graphite ◽  
Necessary Condition ◽  
Thermally Expanded Graphite ◽  
Stress Strain ◽  
Ultra High Molecular Weight

In connection with the huge range of ultra-high molecular weight polyethylene (UHMWPE) grades, the choice of a particular brand is a difficult task. Rational choice of the polymer matrix is a necessary condition for the increase in reliability and service life of products, and consequently, for the efficiency of using these composite materials. The given article presents the results of tests on stress-strain properties of GUR-2122, 4113, 4120, 4130, 4150, 4170 and GHR-8020 ultra-high molecular weight polyethylene grades. GUR-4150 UHMWPE is chosen as the polymer matrix on the base of the test results. It is shown that the friction coefficient of the polymer composite material is reduced even with the modification of UHMWPE with nanodispersed thermally expanded graphite (TEG) in amount of 0.001-0.5 mass%. It is established that the rate of mass wear decreases by 3-4.3 while maintaining the stress-strain properties of the composites at the level of the initial UHMWPE. Polymer composite materials with an improved set of performance indicators are developed.

scholarly journals Achieving Good Protection on Ultra-High Molecular Weight Polythene by In Situ Growth of Amorphous Carbon Film

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 584
Author(s):  
Rui Dang ◽  
Liqiu Ma ◽  
Shengguo Zhou ◽  
Deng Pan ◽  
Bin Xia
Keyword(s):  
Molecular Weight ◽  
Epitaxial Growth ◽  
High Molecular Weight ◽  
Amorphous Carbon ◽  
Transition Layer ◽  
In Situ Growth ◽  
Good Protection ◽  
Ultra High Molecular Weight ◽  
Carbon Plasma

Ultra-high molecular weight polythene (UHMWPE), with outstanding characteristics, is widely applied in modern industry, while it is also severely limited by its inherent shortcomings, which include low hardness, poor wear resistance, and easy wear. Implementation of feasible protection on ultra-high molecular weight polythene to overcome its shortcomings would be of significance. In the present study, amorphous carbon (a-C) film was fabricated on ultra-high molecular weight polythene (UHMWPE) to provide good protection, and the relevant growth mechanism of a-C film was revealed by controlling carbon plasma currents. The results showed the in situ transition layer, in the form of chemical bonds, was formed between the UHMWPE substrate and the a-C film with the introduction of carbon plasma, which provided strong adhesion, and then the a-C film continued epitaxial growth on the in situ transition layer with the treatment of carbon plasma. This in situ growth of a-C film, including the in situ transition layer and the epitaxial growth layer, significantly improved the wetting properties, mechanical properties, and tribological properties of UHMWPE. In particular, good protection by in situ growth a-C film on UHMWPE was achieved during sliding wear.

Wear behavior of in situ polymerized carbon nanotube/ultra high molecular weight polyethylene composites

2013 ◽  
Vol 21 (9) ◽  
pp. 965-970 ◽  
Author(s):  
Hong-Jo Park ◽  
Jihun Kim ◽  
Yongsok Seo ◽  
Junho Shim ◽  
Moon-Yong Sung ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Carbon Nanotube ◽  
High Molecular Weight ◽  
Wear Behavior ◽  
Ultra High Molecular Weight ◽  
Polyethylene Composites

scholarly journals Polymer Nanocomposites Exploited Under The Arctic Conditions

2016 ◽  
Vol 1 (1) ◽  
pp. 122 ◽  
Author(s):  
A.A. Okhlopkova ◽  
L.A. Nikiforov ◽  
T.A. Okhlopkova ◽  
R.V. Borisova
Keyword(s):  
Molecular Weight ◽  
Mechanical Activation ◽  
High Molecular Weight ◽  
Polymer Matrix ◽  
Planetary Mill ◽  
Layered Silicates ◽  
The Arctic ◽  
Liquid Media ◽  
Arctic Conditions ◽  
Ultra High Molecular Weight

<p>Several technologies of the preparation of nanocomposites based on ultra-high-molecular-weight polyethylene were developed. The first technology is based on mechanical activation of layered silicates with surfactant before addition into polymer matrix. The second technology represents mixing of ultra-high-molecular-weight polyethylene with nanoparticles by joint mechanical activation in a planetary mill. The third technology is based on mixing of ultra-high-molecular-weight polyethylene with nanoparticles in liquid media under continuous ultrasonic treatment. Common features of these technologies are reaching of filler uniform distribution in a polymer matrix and significant improvement in the mechanical properties. Also, supramolecular structure of the composites was studied.</p>

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