Abstract
Thermal and tribochemical processes in a phenol formaldehyde composite reinforced with polyoxadiazole fibers and modified with finely dispersed particles of a polyformaldehyde copolymer were studied by mass spectrometry and X-ray photoelectron spectroscopy. Under thermal exposure to polyformaldehyde, the liberated formaldehyde sharply reduces the amount of phenol that is released. In the case of friction, polyformaldehyde is a bifunctional modifier. It forms a discrete surface, which helps reduce the coefficient of friction. The released products can play the role of a “tribochemical lubricant” and, at the same time, a cross-linking agent. Tribological tests of the modified composite showed a decrease in the coefficient of friction (from 0.20 to 0.18) compared with the original composite, and a significant (approximately 2-fold) decrease in the vibration amplitude of the friction coefficient.
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REFERENCES
Holmberg K. and Erdemir A., Influence of tribology on global energy consumption, costs and emissions, Friction, 2017, vol. 5, no. 3, pp. 263–284.
Aderikha V.N., Krasnov A.P., Naumkin A.V., and Shapovalov V.A., Effects of ultrasound treatment of expanded graphite (EG) on the sliding friction, wear resistance, and related properties of PTFE-based composites containing EG, Wear, 2017, vols. 386–387, pp. 63–71.
Wang J., Liu N., Yang J., Han G., and Yan F., Combined effect of chemical surface treatment of Kevlar fabric and PTFE fillers on the water-involved tribological performance of Kevlar fabric/phenolic laminate, Tribol. Trans., 2016, vol. 59, no. 2, pp. 385–390.
Cai P., Wang T., and Wang Q., Effect of several solid lubricants on the mechanical and tribological properties of phenolic resin-based composites, Polym. Compos., 2015, vol. 36, no. 12, pp. 2203–2211.
Osterle W. and Dmitriev A.I., The role of solid lubricants for brake friction materials, Lubricants, 2016, vol. 4, no. 1, p. 5.
Konada N.K. and Suman K.N.S., Review of brake friction materials for future development, J. Mech. Mech. Eng., 2017, vol. 3, no. 1, p. 2.
Xu X., Huang S., Guan J., Hu J., and Peng, W., Grinding performance and self–lubrication mechanism of phenolic resin-bonded grinding wheel filled with inclusion complex of β-cyclodextrin and dialkyl pentasulfide, J. Mater. Process. Technol., 2015, vol. 221, pp. 163–171.
Yuan J., Zhang Z., Yang M., Guo F., Men X., and Liu W., TiB2 reinforced hybrid-fabric composites with enhanced thermal and mechanical properties for high-temperature tribological applications, Tribol. Int., 2017, vol. 115, pp. 8–17.
Bulyaev, D.I., Krasnov, A.P., Naumkin, A.V., Yudin, A.S., Afonicheva, O.V., Golub, A.Yu., Gorshkov, M.V., and Buzin, M.I., Effect of chemical structure of aramide and polyoxadiazole fibers on friction of organoplastics, J. Frict. Wear, 2016, vol. 37, no. 4, pp. 351–357.
ACKNOWLEDGMENTS
This work was supported by Presidium Project of Russian Academy of Sciences 1.16.
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Translated by Sh. Galyaltdinov
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Panova, M.O., Krasnov, A.P., Naumkin, A.V. et al. Tribochemical Processes in a Phenol Formaldehyde Polymer Modified by Polyformaldehyde Copolymer. J. Frict. Wear 39, 462–468 (2018). https://doi.org/10.3103/S1068366618060119
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DOI: https://doi.org/10.3103/S1068366618060119