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Polymers
Special Issues
Polymer Tribology
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Polymer Tribology

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Physics and Theory".

Deadline for manuscript submissions: closed (10 January 2023) | Viewed by 3348

Special Issue Editors

Prof. Dr. Nektaria-Marianthi Barkoula

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Guest Editor
Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
Interests: structure-property relationships in materials; durability of polymers/polymer composites and cement-based composites; tribological behavior of polymers; metals and composites; biodegradable/biobased polymers; recyclability; eco-composites, nanocomposites/multi-functional materials/hierarchical composites
Special Issues, Collections and Topics in MDPI journals
Dr. Maciej Kujawa

E-Mail Website
Guest Editor
Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
Interests: tribology; polymers; friction; polymer composites; 3D printing; mechanical engineering
Dr. Piotr Kowalewski

E-Mail Website
Guest Editor
Department of Fundamentals of Machine Design and Mechatronic Systems, Wroclaw University of Science and Technology, Lukasiewicza 7/9, 50-371 Wroclaw, Poland
Interests: tribology; polymers; friction; polymer composites; biomedical engineering; mechanical engineering

Special Issue Information

Dear Colleagues,

The Special Issue aims at presenting original articles or reviews on polymer tribology. Due to their excellent properties, polymers and plastics have been used in technology for years. Despite many studies conducted in the field of polymer tribology, the friction-wear processes are still a challenge for scientists. The continuous development of technical polymers requires a constant study of the tribological properties of new materials. This Special Issue of Polymers focuses on research on friction, wear, and the development of new methods of tribological testing of polymers. Articles in the Special Issue may apply to polymers, plastics, and polymer-based composites used in all areas of technology and science. The Special Issue will include the best articles on the latest achievements in the field of broadly understood polymer tribology.

This Special Issue invites original papers and reviews reporting on recent progress in the following areas:

  • Tribological properties of new types of polymers and polymer composites;
  • Chemical and physical modifications of polymers to improve their tribological properties;
  • Tribology of biopolymers;
  • Methodology of tribological research on polymers.

Prof. Dr. Nektaria-Marianthi Barkoula
Dr. Maciej Kujawa
Dr. Piotr Kowalewski
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • tribology
  • biotribology
  • wear
  • coefficient of friction
  • tribotester

Published Papers (2 papers)

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Research

13 pages, 4982 KiB  
Article
Study on Tribological Characteristics of Ultra-High Molecular Weight Polyethylene under Unsaturated Lubrication of Water and Brine
by Wenhao Li, Zhenhua Wang, Ningning Liu and Jinzhu Zhang
Polymers 2022, 14(19), 4138; https://doi.org/10.3390/polym14194138 - 3 Oct 2022
Cited by 2 | Viewed by 1272
Abstract
The tribological characteristics of ultra-high molecular weight polyethylene (UHMWPE) under unsaturated lubrication of water and brine were studied. The friction coefficients and wear rates of UHMWPE at different applied loads and sliding speeds were recorded by field tests, and the effects of load [...] Read more.
The tribological characteristics of ultra-high molecular weight polyethylene (UHMWPE) under unsaturated lubrication of water and brine were studied. The friction coefficients and wear rates of UHMWPE at different applied loads and sliding speeds were recorded by field tests, and the effects of load and speed on the friction properties of UHMWPE were analyzed. The results showed that under certain liquid drop (about 150–170 mL/h) lubrication, the tribological behaviors of UHMWPE were better than those of dry sliding, and the friction coefficient and wear rate of UHMWPE were reduced by more than 39% and 10% respectively. The lubrication form of UHMWPE gradually transited from saturated lubrication to unsaturated lubrication with the increase in applied load or sliding speed. The evaporation of water caused by frictional heat affected the water content between the surface of UHMWPE and the counterface, which was the main reason for the change in the lubrication form. In the current work, the critical values for the change of lubrication mode were 70 N and 700 r/min for load and speed, respectively, beyond which UHMWPE was in unsaturated lubrication. Under brine-unsaturated lubrication, the anti-friction property of UHMWPE was better than that in water-unsaturated lubrication at high speed because the precipitated salt granules played a ball effect, which was opposite to that under saturated lubrication. The study of the wear resistance with surface profiler showed that the wear rate of UHMWPE under water-unsaturated lubrication was 9% lower than that under brine-unsaturated lubrication at 110 N load. While the wear resistance of UHMWPE under brine-unsaturated lubrication was better than that in water-unsaturated lubrication at high speed, the wear rate of UHMWPE under brine-unsaturated lubrication was 10% lower than that under water-unsaturated lubrication at 1100 r/min speed. Full article
(This article belongs to the Special Issue Polymer Tribology)
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20 pages, 13643 KiB  
Article
Effect of Transversely Isotropic Elasticity on Elastohydrodynamic Lubrication of Point Contacts
by Enzo Maier, Moritz Lengmüller and Thomas Lohner
Polymers 2022, 14(17), 3507; https://doi.org/10.3390/polym14173507 - 26 Aug 2022
Cited by 2 | Viewed by 1293
Abstract
Fiber-reinforced materials or 3D printed parts feature transversely isotropic elasticity. Although its influence on pressures, shapes, and sizes has been studied extensively for dry contacts, the transferability to lubricated contacts is fragmented. This numerical study investigates how the content and orientation of short [...] Read more.
Fiber-reinforced materials or 3D printed parts feature transversely isotropic elasticity. Although its influence on pressures, shapes, and sizes has been studied extensively for dry contacts, the transferability to lubricated contacts is fragmented. This numerical study investigates how the content and orientation of short fibers in fiber-reinforced polymers (FRP) affect elastohydrodynamic lubrication (EHL) of point contacts. Material properties are modeled with Tandon-Weng homogenization. For EHL modeling, a fully-coupled approach based on finite element discretization is used. Results on hydrodynamic pressure and film thickness as well as material stress distribution are analyzed and compared to common approximations using the effective contact moduli. It is shown that the combination of fiber content and orientation defines the effective contact stiffness that determines the contact shape, size, and film thickness. Furthermore, the contact regime can change if a contact-specific stiffness threshold is reached. Full article
(This article belongs to the Special Issue Polymer Tribology)
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