PSI - Issue 50

A.A. Ushkanov et al. / Procedia Structural Integrity 50 (2023) 294–298 A.A. Ushkanov, A.A. Okhlopkova, A.P. Ammosova / Structural Integrity Procedia 00 (2022) 000 – 000

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As can be seen from Fig. 2, the supramolecular structure of the composites radically differs from the ribbon structure of the initial polymer (Fig. 2a). Structural formations are clearly visible, in which fibers are randomly localized. When comparing the supramolecular structures of the composites, it can be seen that the volume content with CF seems to be greater than with BF, but in both cases a chaotic heterophase structure is formed. The reason for the atypical crystallization for this polymer is most likely the effect of the fiber surface on the processes of PTFE crystallization (Okhlopkova et al. (2011)). It was found that in places the composites have gaps and the absence of binding "threads", which possibly leads to a deterioration in adhesion between the components. Based on the foregoing, it can be concluded that the absence of an additional (third) component contributes to a decrease in adhesive adhesion on the interfacial surface between PCM components. 4. Conclusions It has been established that with the introduction of reinforcing basalt or carbon fillers into the polymer matrix, the physicomechanical properties of the composites increase, regardless of the nature of the filler. It was found that when the matrix is filled with fibers, the mass wear rate during sliding friction decreases by up to 41 times compared with a pure polymer, which indicates the formation of an oriented structure on the friction surface. Acknowledgements This research was funded by the Ministry of Science and Higher Education of the Russian Federation (grant numbers [FSRG-2021-0016]). References Mashkov, Yu.K. Mechanical and tribotechnical properties of composites based on PTFE, optimization of their composition and technology // Bulletin of SibADI, 2010, No. 4 (18), pp. 17-21. Vasilev, A.P., Struchkova, T.S., Nikiforov, L.A, Okhlopkova, A.A., Grakovich, P.N., Shim, E.L., Cho, J.H. Mechanical and tribological properties of polytetrafluoroethylene composites with carbon fiber and layered silicate fillers // Molecules, 2019, No. 24 (2), 224, 11 p. DOI: 10.3390/molecules24020224 Jianzhang, W., Beibei, C., Ning, L., Gaofeng, H., Fengyuan, Y. Combined effects of fiber/matrix interface and water absorption on the tribological behaviors of water-lubricated polytetrafluoroethylene-based composites reinforced with carbon and basalt fibers, Composites Part A: Applied Science and Manufacturing, Volume 59, 2014, Pages 85-92, ISSN 1359-835X. Zongwen, L., Jianxun, M., Hongmin, M., Xin, X. Properties and Applications of Basalt Fiber and Its Composites, IOP Conference Series: Earth and Environmental Science, 2018, 186. Vasilev, A.P., Okhlopkova, A.A., Struchkova, T.S., Dyakonov, A.A., Alekseev, A.G., Grakovich, P.N. The relationship of the supramolecular structure and tribological properties of polytetrafluoroethylene with carbon fibers // Bulletin of NEFU, 2017, No. 5 (61), pp. 37-46. Alifanov, E.V., Chaikun, A.M., Gorlov, D.S., Venediktova, M.A. Features of determining the coefficient of friction of polymeric materials on a tribometer of the UMT-3 MT type // IV All-Russian Conference "The Role of Fundamental Research in Implementation", Moscow, 2018, pp. 17 - 32. Kirillina, Yu.V., Sleptsova, S.A., Ho-Cho J. Influence of the method of mixing components on the properties of a polymer-silicate composite material // Arctic XXI century, 2013, No. 1 (1), pp. 13 - 26. Pomogova, D.I. Influence of ultrasonic action on the structure and properties of polyolefin mixtures. Dissertation for the degree of Candidate of Technical Sciences. Moscow, 2019, 111 p. Negrov, D.A., Putintsev, V.Yu. Improvement of pressing technology of products from polytetrafluoroethylene, J. Sib. Fed. Univ. Eng. & Technol., 2021, 14 (5), 564 – 571. DOI: 10.17516/1999-494X-0333 Kurguzova, O.A. Development of a wear-resistant nanocomposite based on polytetrafluoroethylene in order to improve the performance and durability of metal polymer sealing devices // Dissertation for the degree of Candidate of Technical Sciences. Omsk - 2014 - 107 p. Okhlopkova, А . А ., Vasilev, S.V., Petrova, P.N., Fedorov, A.I., Tuisov, A.G. Basalt fluoroplastic composites for antifriction purposes // Bulletin of NEFU, 2013, V. 10, No. 5, pp. 30 - 36. Vasilev, S.V. Polymer composite materials based on polytetrafluoroethylene and basalt fiber // Bulletin of scientific conferences, 2017, pp. 13 - 14. Okhlopkova, А . А ., Vasilev, S.V., Gogoleva, O.V. Development of polymer composites based on polytetrafluoroethylene and basalt fiber // Oil and gas business, 2011, No. 6, pp. 404 - 409.