Study on the biodegradation of SMR rubber to reduce the environmental wastes: the effects of curing system, reinforcement and oil

Subject Areas :

Somayyeh Mohammadian-Gezaz ¹

1 - Associate professor, Department of Chemical Engineering, Payame Noor University, Tehran, Iran, P.O. Box 19395-3697.

Received: 2022-04-16 Accepted : 2022-08-29 Published : 2022-11-22

Keywords: Oil, Biodegradation, Natural rubber, Carbon black, SMR, sole fraction, curing system,

Abstract :

In this work, the effects of the various parameters such as type of curing system, amount of filler, and type of oil were studied on the biodegradation of natural rubber (NR). The amount of degradation increased in the order of the efficient, semi-efficient and conventional curing system. NR degradation with the NR grade (based on the SMR types) was changed as SMR50 > SMR20 > SMR10 due to the higher impurity. By increasing the carbon black level, degradation decreased. The negative effect of the carbon black on the degradation was more obvious for the finer carbon black (N330) with respect to the coarser one (N550), at the same level. The lowest sole fraction was achieved for efficient curing system. Moreover, the sole fraction increased by NR type as SMR50 > SMR20 > SMR10. Unfilled NR had the higher degradation amount and the higher sole fraction.

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