Keyword: «mixing mode»

The influence of the mixing regime on the properties of low temperature oil-resistant rubbers based on the blend of BNKS-18AMN butadiene-nitrile rubber and GUR 4113 ultra-high molecular weight polyethylene was studied. Different ways of introducing of UHMWPE into the rubber mixture are considered: by mixing before and after the introduction of the main ingredients of the rubber mixture at temperatures up to 80°C (below the melting point of UHMWPE), as well as by preliminary high-temperature (160°C) mixing of rubber and UHMWPE. It was found that preliminary high-temperature mixing of rubber with UHMWPE leads to a decrease in the viscosity of the rubber mixture, as well as a reduction in the scorch time and the achievement of the optimum vulcanization, but does not lead to significant changes in the physical and mechanical properties and oil resistance of vulcanizates.