Investigation of polymer composite materials based on mechanically activated polytetrafluoroethylene

In this work, the influence of mechanical activation of polytetrafluoroethylene PTFE on the properties of filled composites was studied. It has been established that the polymer mixture of PTFE with 10 wt.% activated PTFE in a planetary mill within 5 minutes increases the deformation-strength parameters and the modulus of elasticity. It has been shown that the addition of 0.5-2 wt.% of activated Sibunit to the polymer matrix does not lead to a decrease in deformation-strength characteristics compared to the original PTFE, while the wear resistance of polymer composite materials PCM increases by 6-56 times. This is apparently due to the fact that, upon activation, Sibunit particles are dispersed, and the modified matrix is characterized by improved values of deformation and strength characteristics, which compensates for the negative effect of the filler on these indicators when the Sibunit content is filled to 2 wt.%. An increase in concentration to 5 wt.% leads to an increase in wear resistance by a factor of 107, but to a decrease in the deformation-strength parameters of PCM. Thus, based on the studies performed, the use of a polymer mixture of PTFE-activated PTFE containing up to 10 wt.% of the activated polymer.