The focus of the work was to prepare elastomeric magnetic composites based on a highly elastic polymer matrix (1,4-cis butadiene rubber). Three modifications of the same type of strontium ferrite SrFe12O19, type FD8/24 were applied as magnetic fillers. The applied ferrites differed in particle size distribution and other structural and magnetic characteristics. The work is focused on the preparation of rubber compounds for making elastomeric magnetic composites and evaluation of magnetic fillers influence on curing characteristics, physical-mechanical and magnetic properties of prepared composites. The study is also dedicated to the cross-link density of vulcanizates.Cilj rada je pripremiti elastomerne magnetne kompozite na temelju visokoelastične polimerne matrice (1,4-cis butadienski kaučuk). Tri su modifikacije istog tipa stroncijeva ferita SrFe12O19, tip FD8/24, primijenjene kao magnetna punila. Primijenjeni feriti razlikovali su se po raspodjeli veličine čestica te drugim strukturnim i magnetnim svojstvima. Rad obrađuje pripremu spojeva kaučuka za izradu elastomernih magnetnih kompozita i daje ocjenu utjecaja magnetnih punila na svojstva umreživanja, fizičko-mehanička i magnetna svojstva pripremljenih kompozita. Ispitivanje također obrađuje gustoću umreživanja vulkanizata
