The influence of natural shungite on the properties and structure of polytetrafluoroethylene

Abstract

The paper presents the results of physical-mechanical and tribological studies of composites based on polytetrafluoroethylene and natural shungite. It has been established that the introduction of shungite leads to an increase in the wear resistance of the material by 114 times compared to an unfilled polymer. Electron microscopy has shown that a secondary layer is formed on the friction surface of the composites, which protects the material from wear. Using IR spectroscopy, it has been established that during the wear of composites, tribochemical reactions occur with the formation of oxygen-containing functional groups and subsequent structuring of the surface layer. The results of the study obtained by differential scanning calorimetry show that the presence of natural shungite in the PTFE matrix leads to ordering of the structure of the composites.