ANALYSIS OF NETWORK STRUCTURE IN ELASTOMERIC MAGNETIC COMPOSITES

Denisa Bellušová – Gabriela Kyselá – Eva Ürögiová – Ivan Hudec – Rastislav Dosoudil

   The incorporation of magnetic fillers (strontium hexaferrites) in the elastomeric matrix on the base of unsaturated elastomers for general use provides magnetic properties of their cross-linked elastomeric composites considerably. The properties of these crosslinked elastomeric composites are dependent on the level of magnetic fillers and carbon black loading, too. The magnetic fillers and carbon black also have influence on their network structure and its possible change in process of accelerated thermo–oxidative aging. Crosslink density of prepared composites was determined from receives results of the kinetics study of their swelling in xylene using the modified Flory-Rehner equation according to Kraus for filled vulcanizates.

Keywords: hard magnetic materials, strontium hexagonal ferrite, permanent magnet, aging, network structure

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