Effect of different vulcanization systems on properties of environment-friendly hard nitrile rubber

The pilot product of nitrile rubber(NBR) was synthesized with rosin soap and oleic acid soap as complex emulsifier system,and the product was vulcanized with sulfur and peroxide vulcanization systems respectively.The curing characteristics of NBR and mechanical properties,aging resistance,oil and cold resistances of NBR vulcanizates were studied and compared with those of traditional NBR 3604,The results showed that the sulfur vulcanized NBR had lower degree of vulcanization and slower vulcanization rate,but the peroxide vulcanized NBR had higher degree of vulcanization and faster vulcanization rate,so that the NBR was fitter to be vulcanized with peroxide.There were no evident difference between NBR 3604 and NBR vulcanized with the two vulcanizer systems in mechanical properties,but the peroxide vulcanized NBR had better aging resistance,and the two vulcanizers vulcanized NBR had better cold resistance and poor oil resistance.