Abstract
Temporal variation of the contact temperature in the zone of friction of a coating based on a mixture of polyamides 6.6 (PA6.6) and 6 (PA6) on steel 45 has been studied using a thermocouple junction situated at a distance of ≈1.5 mm from the friction zone. On the background of a monotonic temperature growth, there are two troughs in which the temperature (T 1 and T 2) stabilizes for a certain period of time and then increases again. It is established that the values of T 1 and T 2 are close to the temperatures of glass transitions in PA6.6 and PA6, respectively. The appearance of troughs is related to a sharp increase in the energy of friction that is spent for the segmental mobility during the glass transitions in the polymer composition. A comparison of the T 1 and T 2 values to the exact glass transition temperatures shows that the contact temperature in the friction zone is 10–20 K higher than the value measured by the thermocouple.
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Original Russian Text © V.I. Vettegren, A.Ya. Bashkarev, A.A. Lebedev, 2006, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2006, Vol. 32, No. 8, pp. 78–82.
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Vettegren, V.I., Bashkarev, A.Y. & Lebedev, A.A. Determining the contact temperature in the zone of friction of a polymer coating on steel. Tech. Phys. Lett. 32, 361–363 (2006). https://doi.org/10.1134/S1063785006040262
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DOI: https://doi.org/10.1134/S1063785006040262