Wear behavior of UHMWPE composites under oxidative effect

GÜRGEN S.

POLYMER DEGRADATION AND STABILITY, cilt.199, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 199
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.polymdegradstab.2022.109912
  • Dergi Adı: POLYMER DEGRADATION AND STABILITY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Biotechnology Research Abstracts, CAB Abstracts, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Veterinary Science Database, Civil Engineering Abstracts
  • Anahtar Kelimeler: UHMWPE, Polymer composites, Wear, Oxidation, MOLECULAR-WEIGHT POLYETHYLENE, MECHANICAL-PROPERTIES, NANO, RESISTANCE, COMPONENTS, RADIATION, RHEOLOGY, SILICON
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

Ultra-high molecular weight polyethylene (UHMWPE) is widely used in sliding systems due to its advanced tribological properties. For this reason, wear comes into prominence as a major deformation mechanism in industrial applications. In most of the applications, components are open to contaminants and thereby being exposed to different kinds of chemicals. Oxidation is one of chemical degradations evolving in acidic environments while accelerating the wear process in the components. Although there are some efforts paid on the wear properties of UHMWPE, literature lacks an attention to combined effect of wear and oxidation in UHMWPE. In the present work, neat UHMWPE specimens were fabricated in a compression molding chamber by varying the molding pressures. After deciding on the optimum pressure at 250 bar, different loadings (2wt%, 4wt% and 8wt%) of Si3N4 particle fillers were included in the polymer matrix. This additive was selected due to its superior wear and oxidation resistance. Oxidation tests were carried out in an acidic medium, which is a realistic oxidative environment for industrial products. An abrasive system was used in the wear tests. According to the results, oxidation leads to a heavy degradation in anti-wear properties of neat UHMWPE that yielding a specific wear rate of 4.99x10(-3) mm(3)/Nm. However, wear resistance is enhanced to a specific wear rate of 3.82x10(-3) mm(3)/Nm by adding fillers up to a limit loading rate of 2wt%. (C) 2022 Elsevier Ltd. All rights reserved.