Effect of reactionary capable siloxane compatibilizer on the properties of blends of ethylene propylene diene and siloxane rubbers

Polydimethyl(methylvinyl)siloxane with long-chain hydrocarbon fragments was synthesized at a sequence of chemical reactions. The resulting graft copolymer was used as a compatibilizer of ethylene propylene diene/siloxane rubbers blends of different compositions. It has been established that the introduction of reactive compatibilizer in a concentration not higher than 6 wt.% in the blend of rubbers allows to increase their compatibility due to co-vulcanization of graft copolymer with each of the components under the hydrosilylation conditions and, possibly, due to the formation of chemical bonds between rubber phases, which leads to an increase in the strength properties of the compositions.