Abstract
Antifriction self-lubricating polymer composites are increasingly being used for the manufacture of parts of tribo-conjugation machines. (Research purpose) The research purpose is studying the tribological properties of polyamide composites filled with molybdenum disulfide MoS2 and compare the obtained values with pure polyamide 6. (Materials and methods) Compounding was carried out on a laboratory two-rotor mixer HAAKE PolyLab Pheomix 600 OS with Roller rotors at a temperature of 230 degrees Celsius and a rotor speed of 50 revolutions per minute until constant values of torque and melt temperature were reached. It was determined that the concentration of molybdenum disulfide varied from 2 to 10 percent. Cylindrical samples were made for the experiment by hot transfer molding on a Gibitre GT-7014-H50C hydraulic press, with a diameter of 2 ± 0.01 millimeters, a length of 5 ± 0.1 millimeters. Tribotechnical tests were carried out on the developed prefix to the HAAKE MARS III rheometer. (Results and discussion) It was found that the addition of molybdenum disulfide to polyamide 6 significantly increases the wear resistance of the composite by reducing the coefficient of friction. At the same time, the content of this filler in the compound should not exceed about 5 percent. (Conclusions) As a result of the conducted experimental studies, it was found that the introduction of molybdenum disulfide into polyamide 6 significantly increases the wear resistance of the composite. Taking into account the previously conducted studies of the physical and mechanical properties of these composites, the concentration of molybdenum disulfide in them in the range from 2 to 5 percent is recommended. The resulting polymer compositions can be successfully used for the manufacture of tribo-coupling parts of both new and refurbished machines.
Published Version
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