POLYMER COMPOSITES BASED ON POLYTETRAFLUOROETHYLENE AND NATURAL LAYERED SILICATES FOR SEALING DEVICES OF NORTHERN EQUIPMENT
S. A. Sleptsova, N. N. Lazareva, Yu. V. Kapitonova, S. Laukkanen, E. S. Afanasyeva
Ammosov North-Eastern Federal University, Yakutsk, Russia
Keywords: Polymer composites, layered silicates, wear resistance, mechanical activation, friction surface
Abstract
The study of composite properties using the methods of mechanical activation showed the effectiveness of using layered silicates (LS) as PTFE modifiers. The exceptional effect of LS on the increase in wear resistance of PTFE is shown. The most significant influence on the set of PTFE characteristics was determined in the case of filling PTFE with silicates having a dioctahedral grid in their structure, due to the presence of aluminum cations. The formation of a protective layer serving as plastic grease was noted on the friction surface by the SEM method. New sealing materials were developed for extreme operating conditions, they are characterized by increased mechanical characteristics, tribo, frost- and heat resistance.
|
