Sulfur-cure

 

For sulfur-curing, the amount of termonomer in the EPDM polymer (unsaturation in the side chain) determines the rate of crosslinking. However even at high termonomer levels, EPDM has a lower reactivity in comparison to Natural Rubber or Butadiene Rubber, and therefore accelerators must be used to achieve cure times that are acceptable in practice. Care must be taken in designing the accelerator package, as many have limited solubility in EPDM which can result in surface blooming.

 

 

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