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Polímeros

versão impressa ISSN 0104-1428

Resumo

OLIVEIRA, Marcia G. et al. Characterization of rheological and dynamic properties of natural rubber compositions with waste EVA. Polímeros [online]. 2004, vol.14, n.5, pp. 301-306. ISSN 0104-1428.  http://dx.doi.org/10.1590/S0104-14282004000500005.

The EVA waste (EVAR) is a crosslinked material, which can be used as filler in rubber compositions. In this work, rheological and dynamic properties of natural rubber (NR) compositions with EVAR were investigated before and after vulcanization with the help of a rubber processing analyzer (RPA). The filler content varied from 0 to 60 phr. The results showed that rheological properties of nonvulcanized compositions were clearly modified by the addition of EVAR, which contributed to an increase in viscosity. The modulus relaxation and the dynamic properties such as tan d of vulcanized compositions were also affected, by the reduction of the elasticity of the compositions. The mechanical properties corroborated the behavior revealed by RPA analysis and indicated that EVAR acted as a non-reinforcing filler.

Palavras-chave : Waste EVA; recycling; rubber compositions.

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