Material Recycling of End-of-Life Tires: The Influence of Recyclates on the Processing of Rubber Compounds

The paper focuses on the recycling of end-of-life tires (ELTs) by admixing ELT recyclates to rubber compounds. It deals with the physical and chemical interactions resulting from the admixture of finely ground powder from end-of-life tires to a sulfur-cured rubber compound. Using exemplary rubber recipes, the effects of viscosity increase, accelerated crosslinking and stiffness decrease are quantified and the underlying reasons are explained.