Abstract
This study focused on the blends of natural rubber (NR) containing virgin ethylene propylene diene rubber (EPDM) and recycled ethylene propylene diene rubber (R-EPDM). The blends’ properties ranged from 90/10, 80/20, 70/30, 60/40, and 50/50 (phr/phr) of NR/EPDM and NR/R-EPDM blends were observed. Results showed that both mixtures decreased tensile strength and elongation at break. In contrast, thermal stability showed an opposite trend as the weight ratio of EPDM or R-EPDM increased. The minimum torque (ML), maximum torque (MH), torque difference (MH–ML), scorch time (ts2), and cure time (tc90) of the blends exhibited increasing trend over the loadings of virgin EPDM or R-EPDM. This can be evidently seen from SEM micrographs showing a decrement in crack path especially when adding virgin EPDM or R-EPDM over 30 phr. This has led to less resistance to crack growth and thus lowering strength of the blends.
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Hayeemasae, N., Ismail, H. (2023). Comparative Studies of Natural Rubber/Virgin Ethylene Propylene Diene Rubber and Natural Rubber/Recycled Ethylene Propylene Diene Rubber and Natural Rubber/Blends. In: Ismail, H., S. M., S., R. A., I. (eds) Recycled Polymer Blends and Composites. Springer, Cham. https://doi.org/10.1007/978-3-031-37046-5_9
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