Polymer Composites Based on Aromatic Polyamide and Aramid Fiber for Heavy-Duty Friction and Sealing Units

The paper substantiates the selection of a polymer and filler based on aromatic polyamide to create a material of friction pairs that operate in heavy-duty friction and sealing units of up-to-date vehicles and machinery. The effect of load and sliding speed on the tribological behavior of the initial aromatic polyamide and filled 15%-aramid fiber was studied. As a result of tribological studies, the terminal operating conditions of products made of initial aromatic polyamide and a composite based thereon, filled with aramid fiber, have been determined. The basic physical and mechanical properties of the materials under study have been determined, and it is established that the introduction of aramid fiber into the aromatic polyamide contributes to a 10-15% reduction in the level of the properties thereof due to the occurrence of micro- and macrodefects of its structure.