Dynamic Vulcanized Thermoplastic Elastomers Based on Ethylene-Propylene Terpolymer and Polyethylene

The paper presents the studies on the obtaining and characterization of new types of dynamically vulcanized thermoplastic elastomers based on ethylene-propylene terpolymer rubber and polyethylene. As a vulcanizing agent, a phenolic resin (0-15 parts per 100 parts rubber) was used in the presence of dehydrated stannous chloride. Mixtures were obtained by the dynamic vulcanization technique in a Plasti-Corder Brabender mixer at 80 rpm and a temperature of 170°C. Analyzing variations of physical-mechanical characteristics depending on the amount of resin introduced into the blends, it was observed that 100% modulus, tensile strength, and tear strength increased to an optimal point after which they tended to decrease. By dynamically crosslinking the elastomer in the thermoplastic polymer melt there was a significant improvement in the resistance to repeated flexures, behavior to permanent deformation at compression, and resistance to the action of toluene. New materials can be used in various fields such as: the footwear industry (soles, heels and plates), protection equipment, obtaining gaskets, hoses, technical rubber products for cars, etc.