FLUOROPOLYMER MATERIALS FOR FRICTION KNOTS MODERN MACHINES AND MECHANISMS
Keywords:
фторполімери; PTFE; тертя; зношування; фрикційна взаємодія.Abstract
Inmodern machine-building in Ukraine, quite significant difficulties arise, which are connected with the war between Ukraine and Russia. In particular, this concerns the shortage of some polymer materials of Russian production, which were previously widely used in Ukraine. Such polymers include fluoropolymer polytetrafluoroethylene, trademark “фторопласт-4”. This material is quite widely used in friction units of machines and mechanisms. Therefore, the urgent task is to find analternative to “фторопласт-4” produced by the countries of the European Union, the USA, China, etc. Inthework, the following polytetrafluoroethylenes were chosen as an alternative to fluoroplastic-4: PTFE Powder101 and PTFE Powder161 manufactured by Stargetfluoro (Beijing, China). Studiesoftheir physico-mechanical, thermophysical and tribological properties have be enconducted and it has been establishedth at the studied materials exceed the norm at the same levelas “фторопласт-4” in term soft heir level. This allows ustoassert that PTFE Powder101 and PTFE Powder161 fluoropolymersareanalternativeto “фторопласт-4”, whicharefully capable of replacing it in the friction units of machines and mechanisms. Tribologicalstudieswerecarried out to determine the run-in path of fluoropolymers PTFE Powder101 and PTFE Powder 161, which is 250–400 m during frictional interaction with steel. The maximum load limit (up to 0.8 MPa) at which products made of the studied materials retain their performance was determined.
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