Study of the influence of dispersed fillers on properties of rubber for gaskets of rail fastening

The effect of dispersed fillers (NDP-D-400 and NDP-230 diatomites, microquartz and magnesium hydrosilicate) on the rheometric, physical-mechanical, operational and dynamic (sound-absorbing) properties of rubber based on general and special purpose caoutchoucs used for the manufacture of rail fastening gaskets has been studied. The rubber mixture was prepared on laboratory rollers LB 320 160/160, and then vulcanized in
a P-V-100-3RT-2-PCD press. For the rubber compound, the vulcanization characteristics were studied, and for the vulcanizates, the physical and mechanical properties, their changes after exposure to aggressive environments and dynamic performance. It has been established that dispersed fillers improve the technological properties of the rubber mixture, increase the physical and mechanical, dynamic performance and resistance of rubber to aggressive media. It is shown that vulcanizates containing diatomites NDP-230 and NDP-D-400 in an amount of 5.0 phr, are characterized by improved physical, mechanical, operational and dynamic properties.