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Article

Tribological and Mechanical Behavior of Graphite Composites of Polytetrafluoroethylene (PTFE) Irradiated by the Electron Beam

1
Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland
2
Institute of Sport Science, The Jerzy Kukuczka Academy of Physical Education, Mikołowska 72A, 40-065 Katowice, Poland
3
Department of Sports Medicine and Medical Rehabilitation, Sechenov University, 119991 Moscow, Russia
4
Institute of Primary Care, University of Zurich, 8091 Zurich, Switzerland
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(8), 1676; https://doi.org/10.3390/polym12081676
Received: 30 June 2020 / Revised: 21 July 2020 / Accepted: 25 July 2020 / Published: 28 July 2020
(This article belongs to the Special Issue Tribology of Polymers)
This research investigated the effect of irradiation with an electron beam energy of 10 MeV in doses of 26–156 kGy on polytetrafluoroethylene (PTFE) with a 15% and 20% graphite additive. The research has shown that mechanical (compression strength, hardness, and Young’s modulus) and sclerometric (coefficient of wear micromechanism and coefficient of resistance to wear) properties improve and tribological wear decreases as graphite content increases. Electron beam irradiation increases the degree of crystallinity of both materials to a similar extent. However significant differences in the improvement of all examined properties have been demonstrated for PTFE with higher (20%) graphite content subjected to the electron beam irradiation. This polymer is characterized by higher hardness and Young’s modulus, reduced susceptibility to permanent deformation, higher elasticity, compression strength, and above all, a nearly 30% reduction in tribological wear compared to PTFE with a 15% graphite additive. The most advantageous properties can be obtained for both of the examined composites after absorbing a dose of 104 kGy. The obtained results hold promise for the improvement of the operational life of friction couples which do not require lubrication, used for example in air compressors and engines, and for the possibility of application of these modified polymers. In particular PTFE with 20% graphite content, in the nuclear and space industry. View Full-Text
Keywords: PTFE; graphite; electron beam irradiation; differential scanning calorimetry (DSC); mechanical properties; wear PTFE; graphite; electron beam irradiation; differential scanning calorimetry (DSC); mechanical properties; wear
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MDPI and ACS Style

Barylski, A.; Swinarew, A.S.; Aniołek, K.; Kaptacz, S.; Gabor, J.; Stanula, A.; Waśkiewicz, Z.; Knechtle, B. Tribological and Mechanical Behavior of Graphite Composites of Polytetrafluoroethylene (PTFE) Irradiated by the Electron Beam. Polymers 2020, 12, 1676. https://doi.org/10.3390/polym12081676

AMA Style

Barylski A, Swinarew AS, Aniołek K, Kaptacz S, Gabor J, Stanula A, Waśkiewicz Z, Knechtle B. Tribological and Mechanical Behavior of Graphite Composites of Polytetrafluoroethylene (PTFE) Irradiated by the Electron Beam. Polymers. 2020; 12(8):1676. https://doi.org/10.3390/polym12081676

Chicago/Turabian Style

Barylski, Adrian, Andrzej S. Swinarew, Krzysztof Aniołek, Sławomir Kaptacz, Jadwiga Gabor, Arkadiusz Stanula, Zbigniew Waśkiewicz, and Beat Knechtle. 2020. "Tribological and Mechanical Behavior of Graphite Composites of Polytetrafluoroethylene (PTFE) Irradiated by the Electron Beam" Polymers 12, no. 8: 1676. https://doi.org/10.3390/polym12081676

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