LAVRQN. NEW POLYMER COMPOSITION FOR THE RESTORATION OF TRIBOCOUPLINGS OF MACHINES

Abstract

The use of antifriction wear-resistant self-lubricating polymer compositions are of great interest, which can be successfully used for the manufacture or restoration of a large range of tribocoupling of machines. (Research purpose) The research purpose is studying the properties of polyamide composites filled with molybdenum disulfide MoS2 and comparing the obtained values with pure polyamide 6. (Materials and methods) Compounding of components was carried out on a laboratory two-rotor mixer HAAKE PolyLabPheomix 600 OS with Roller rotors. The compounding temperature was 230 degrees Celsius, the rotation speed of the rotors was 50 revolutions per minute. Plates with a size of 200 by 200 by 1.1 millimeters were made on a hydraulic press to study the physical and mechanical properties of the resulting composite material, five samples (type 1) for each composition were cut out for physico-mechanical tests. Tests were carried out on a UAI-7000 M breaking machine at a temperature of 23 ± 2 degrees Celsius and a tensile velocity of 10 millimeters. (Results and discussion) The introduction of molybdenum disulfide leads to an increase in the strength parameters of the polymer composition. Samples with a filler content of less than 10 percent are capable of significant forced-elastic deformation, which suggests the possibility of orientational hardening of the composite. (Conclusions) Based on the conducted physical and mechanical tests, that the addition of molybdenum disulfide can significantly improve the elastic-strength properties of PA-6. At the same time, its content in the compound should not exceed five percent. The resulting polymer compositions can be successfully used for the manufacture of parts that form friction pairs both in the manufacture and repair of machines.