RECYCLING OF SCRAP RUBBER IN TECHNICAL EL ASTOMERS

The physical properties of rubber crumb modified technical elastomers from NR-, CR- and NBR (with 18 and 38% ACN) are demonstrated and inter preted by elementar models for multi component Systems. Starting from a chemical and morphological characterization of the rubber crumb from truck tire treads, the influence of composition and particle size dis tribution on technical relevant properties like tensile strength, stat ic and dynamic tear strength, compression set, swelling, thermal condu ctivity and dynamical resistance in flexometer tests is shown. Negativ e and positive effects of rubber crumb are found, dependent on the spe cific properties of the crumb and the rubber matrix.