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.
Acknowledgements
The authors would like to express their sincere
appreciation to KingAbdulaziz City for Science and
Technology (KACST) for funding the project, which led
to this publication. Also, thanks are extended to
Mr. Fadhl Al-Fadhl, Mr. Khalid Al-Showish and
Mr. Hitham Al-Githmi for compounding,sheeting,
irradiatingand testingsamples.
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.AcknowledgementsThe authors would like to express their sincereappreciation to KingAbdulaziz City for Science andTechnology (KACST) for funding the project, which ledto this publication. Also, thanks are extended toMr. Fadhl Al-Fadhl, Mr. Khalid Al-Showish andMr. Hitham Al-Githmi for compounding,sheeting,irradiatingand testingsamples.
การแปล กรุณารอสักครู่..
