4. Conclusions
The present results indicate that the radiation-cured
formulations of SBR containing45 phr of HAF-carbon
black, 1.5 phr of coagent SR-633, 1 phr of both IPPD
and TMQ, 5 phr of EPDM and irradiated to 150 kGy
have superior mechanical properties and thermal stability
compared with those of the chemically vulcanized
compounds. Whereas, the radiation-cured formulations
of the NR rubber formulation containing45 phr of
HAF-carbon black, 5 phr of the coagent 517, 1 phr of
IPPD, 1 phr of TMQ, 1 phr of paraffin wax and
irradiated to 200 kGy have similar mechanical properties
but superior thermal stability (based on the % change in
E after thermal aging), when compared with those of the
sulfur-vulcanized compounds and slightly better than
those of the peroxide-vulcanized compounds.
4. ConclusionsThe present results indicate that the radiation-curedformulations of SBR containing45 phr of HAF-carbonblack, 1.5 phr of coagent SR-633, 1 phr of both IPPDand TMQ, 5 phr of EPDM and irradiated to 150 kGyhave superior mechanical properties and thermal stabilitycompared with those of the chemically vulcanizedcompounds. Whereas, the radiation-cured formulationsof the NR rubber formulation containing45 phr ofHAF-carbon black, 5 phr of the coagent 517, 1 phr ofIPPD, 1 phr of TMQ, 1 phr of paraffin wax andirradiated to 200 kGy have similar mechanical propertiesbut superior thermal stability (based on the % change inE after thermal aging), when compared with those of thesulfur-vulcanized compounds and slightly better thanthose of the peroxide-vulcanized compounds.
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