Properties of chlorinated polyethylene/chloroprene rubber blends filled with different particle size carbon black

Chlorinated polyethylene and chloroprene rubber(CM/CR) blends were filled with different particle size carbon black.The effects of particle size of carbon black on its dispersity in the blend and the curing characteristics,mechanical properties,dynamic mechanical properties and oil resistance of the blends were investigated.The results showed that the Mooney viscosity of CM/CR blends declined,but optimum cure time prolonged with the increase of particle size of carbon black.Too large or too small particle size of carbon black was unfavorable to its dispersion.The Payne effect was observed for the blends filled with different particle size carbon black.The smaller the particle size of carbon black,the better the reinforcement effect and the oil resistance of the blends,but the Payne effect was more obvious compared to that of other blends filled with larger partide size carbon black.