Resumo

OLIVEIRA, Marcia G.  e  SOARES, Bluma G.. The Influence of the Vulcanizing System on Curing, Mechanical and Ageing Properties of NBR/EPDM Blends. Polímeros [online]. 2002, vol.12, n.1, pp.11-19. ISSN 1678-5169.  http://dx.doi.org/10.1590/S0104-14282002000100007.

NBR and EPDM differ in the number of double bonds and also in polarity, thus presenting different cure rates. Their blends frequently result in a maldistribution of crosslinks. In this work, sulfur-based systems varying in accelerator type and sulfur amount were investigated as vulcanizing systems for NBR/EPDM blends. The accelerator type and the sulfur concentration affected the curing characteristics of the blends. Some formulations were able to crosslink the EPDM phase to a larger extent and consequently displayed better mechanical and ageing properties.

Palavras-chave : Curing system; elastomer blends; NBR; EPDM.

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