Аннотация:Highly filled vulcanizates based on polyisoprene, organosilicon fillers (polymethylsilsesquioxane and MQ-copolymers), and p-quinone dioxime derivative as a rubber cross-linking agent were prepared. The properties of model rubbers are compared with those formed on the basis of the same elastomer with standard reinforcing fillers, namely, carbon black and aerosil. The effect of fillers on the thermal and mechanical properties of cross-linked objects is estimated. The presence of organosilicon compounds as fillers increases the thermal stability of the composites, and in the case of polymethylsilsesquioxane, both the strength and the tensile modulus of vulcanizates are increased in comparison with rubbers based on standard fillers.