Abstract

Tensile strength, hardness and elongation at break have been measured for ethylene–propylene diene (EPDM) rubber loaded with different concentrations of HAF carbon black. The effect of temperature and time of ageing on such properties has also been investigated. It was found that tensile strength increases with carbon content while it decreases with temperature and ageing time. On the other hand, the hardness was found to increase with carbon black content and time of ageing, while elongation at break exhibited an inverse behaviour. All results were attributed to the changes on the backbone structure.

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