EB-promoted recycling of waste tire rubber with polyolefins

Despite the fact that more and more methods and solutions are used in the recycling of polymers, there are still some problems, especially in the recycling of cross-linked materials such as rubber. Usually the biggest problem is the lack of compatibility between the cross-linked rubber and the thermoplastic matrix. In this study we applied ground tire rubber (GTR) as recycled material. The GTR was embedded into polyethylene (PE) and polyethylene/ethylene-vinyl acetate copolymer (PE/EVA) matrices. In order to increase the compatibility of the components electron beam (EB) irradiation was applied. The results showed that the irradiation has a beneficial effect on the polymer–GTR interfacial connection. The EB treatment increased not only the tensile strength but also the elongation at break. The irradiation had also positive effect on the impact strength properties.

► In this study ground tire rubber was incorporated into polyethylene (LDPE) matrix.
► Compatibilizing effects of irradiation and ethylene-vinyl acetate were investigated.
► The samples were manufactured by twin-screw extrusion and injection molding.
► Both compatibilizing methods improved the rubber-like properties of the blends.
► This improvement was especially significant when they were applied together.