THE RESULTS OF THEORETICAL AND EXPERIMENTAL STUDIES OF TRIBOTECHNICAL PURPOSES COMPOSITES ON THE BASIS OF EPOXY COMPOSITE MATERIAL

  • 1Technical University in Kosice, Faculty of Manufacturing Technology with Seat in Presov, Presov, SK
  • 2Sumy State University, Faculty of Technical Systems and Energy Efficient Technologies, Department of Applied Materials Science and Technology of Constructional Materials, Sumy, UA
  • 3Lutsk, UA
  • 4Lutsk National Technical University, Technology Faculty, Department of Materials Science, Lutsk, UA
  • 5Slovak University of Agriculture in Nitra, Faculty of Engineering, Department of Electrical Engineering, Automation and Informatics Nitra, Nitra, SK
  • 6Institute of Technology and Business in Ceske Budejovice, Faculty of Technology, Department of Mechanical Engineering, Ceske Budejovice, CZ

Abstract

The results of theoretical and experimental studies of tribotechnical purposes composites on the basis of polytetrafluoroethylene (PTFE) and epoxy composite material with fillers of different chemical nature are given. The results have been obtained that prove that the introduction of carbon fiber of optimum length ensures the formation of a composite structure in which the fibers are evenly distributed and have sufficient surface energy to increase adhesion strength. It has been established that depending on the parameters of mechanical activation (the number of revolutions of the working organs of the mill, activation time), an ordered spherulite supramolecular structure of PTFE with an increased heat resistance on (293-353) K is formed. No marked fracture of the molecular chain of the polymer has been observed, but the concentration of free CF2 groups to (4-8) times. For the first time, the conditions for obtaining self-organized structures on the tribological surfaces were determined by the stepwise growth of the frictional load (gradual increase in the slip rate for a constant specific load or a gradual increase in the specific load at a steady slip rate).

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