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Manganese‐zinc ferrite is incorporated into natural rubber in order to prepare rubber magnetic composites. The main goal of the work is to investigate the influence of content of magnetic soft ferrite on physical–mechanical and electromagnetic shielding properties of magnetic composites. The results reveal that the tested composites are able to efficiently shield the electromagnetic radiation by absorption mechanisms. All composites containing 200 phr or more filler exhibit sufficient absorption shielding. On the other hand, the strength characteristics of the composites decreases with increasing content of ferrite. [ABSTRACT FROM AUTHOR]

Manganese‐zinc ferrite as magnetic filler is compounded with NBR or NR based elastomer matrices in two steps. Manganese‐zinc ferrite is the most important part of elastomer compounds because of its magnetic properties, but it is inactive filler and thus carbon black is added into the rubber formulations as well. The rubber compound filled only with ferrite exhibits high viscosity and it is not able to be processed by extrusion. For this reason, rheological properties of all compounds with different ratio of processing additives and fillers are studied. It has been found out in our previous research that rubber compounds filled with 200 phr of ferrite showed the best electromagnetic shielding performance. Dispersion Z and dispersion D of cured and uncured elastomer compounds with processing additives Werbablend and Werbalub, which are mixed in laboratory and industrial kneading machine, are determined on an instrument disperGRADERTM αview. [ABSTRACT FROM AUTHOR]