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Friction and wear behaviour of electron beam modified PTFE filled EPDM compounds |
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| Authors: | M Sohail Khan R Franke U Gohs D Lehmann G Heinrich |
| Affiliation: | 1. Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany;2. IMA Materialforschung und Anwendungstechnik GmbH Dresden, Wilhelmine-Reichard-Ring 4, 01109 Dresden, Germany;1. Research Institute for Science and Engineering (RISE), Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan;2. Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan;3. National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan;1. Chengde Petroleum College, Chengde 067000, PR China;2. College of Mechanical Engineering and National College of Defense Technology, Yanshan University, Qinhuangdao 066004, PR China;1. Department of Mechanical Engineering, Texas A&M University, College Station, TX, USA;2. Department of Mechanical & Industrial Engineering, Texas A&M University-Kingsville, Kingsville, TX, USA;3. Hoerbiger Corporation of America, Inc., Houston, TX, USA;1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China |
| Abstract: | The friction and wear of non-modified and electron beam modified polytetrafluoroethylene (PTFE) filled ethylene–propylene–diene–monomer (EPDM) rubber investigated with the help of pin on disk tribometer showed different behaviour during the sliding contact with hard spherical steel-ball. The friction coefficient (μ) and specific wear rate (k) of modified PTFE filled EPDM increased with an absorbed dose of PTFE powder while non-modified PTFE filled EPDM showed the lowest μ and k values. This variation in friction and wear behaviour of PTFE filled EPDM compounds is caused by the influence of radiation induced chemical changes in PTFE powder on the radical initiated peroxide crosslinking. It results from the lower crosslinking efficiency and consequently in the deterioration of the bulk properties. The electron modification of PTFE powder reduces the hardness (modulus) and increases the energy dissipation (tan delta) of compounds. Beside other factors, these variations in bulk properties have been shown to have deleterious effects on the friction and wear properties of electron beam modified PTFE filled EPDM. |
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