Abstract
In the present work, rubber magnetic composites were prepared by incorporation of strontium ferrite into rubber matrices based on natural rubber (NR) and acrylonitrile–butadiene rubber (NBR). Sulphur, peroxide and mixed sulphur/peroxide curing systems were introduced in cross-linking of rubber matrices. The aim was to investigate the influence of curing system composition on physical–mechanical, thermo-physical and magnetic properties of prepared rubber composites and the curing process. Then, the determination of cross-link density and the structure of cross-links were under consideration. The achieved results showed that all investigated parameters were changed depending on the composition of curing system, but also on the type of rubber matrix. While the tensile strength of composites based on NR increased with increasing amount of sulphur in mixed curing systems, in case of composites based on NBR, the highest value of tensile strength reached the value of the sample cured with equivalent ratio of sulphur and peroxide. On the other hand, thermo-physical and magnetic characteristics were found not to be dependent on the curing system composition. The results revealed that not only the composition of curing system, but also the type of rubber matrix plays an important role when preparing the final materials.
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This work was supported by the Slovak Research and Development Agency under Contract No. APVV069412.
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KRUŽELÁK, J., DOSOUDIL, R., SÝKORA, R. et al. Rubber composites cured with sulphur and peroxide and incorporated with strontium ferrite. Bull Mater Sci 40, 223–231 (2017). https://doi.org/10.1007/s12034-016-1347-z
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DOI: https://doi.org/10.1007/s12034-016-1347-z