Evaluation of compatibility of EPDM and butyl rubber—II. Thermal and radiation stability (original) (raw)

The exposure of ethylene-propylene terpolymer/butyl rubber blends to gamma radiation was carried out in order to evaluate the level of their compatibilization. Three concentrations of the components (3:1, 1:1 and 1:3) were prepared. Gel content measurements were performed in o-xylene and oxygen uptake was used to characterize the oxidation stability of irradiated specimens. The optimal dose range for ecient crosslinking of EPDM/IIR blends is around 200 kGy. The derivatives of the O 2 ft dependences indicate the order of thermal stability of radiochemically processed samples. #