"Effect of different curing agents on properties of hydrogenated nitrile rubber"

Abstract

The effect of dicumyl peroxide(DCP), di-tert-butylperoxyisopropyl benzene (BIPB) and 2,5-dimethyl-2,5-di-tert-butylperoxy hexane（DHBP） on properties of hydrogenated nitrile rubber（HNBR）were investigated. The results showed that, in the case of decomposing the same number of free radicals, the compound from DCP had the lowest Mooney viscosity increment, the shortest scorch time, the fastest curing speed, the worst tensile strength and the best hot air aging resistance. The compound from DHBP had the longest scorch time, the slowest cu-ring rate, the lowest hardness and modulus, the hi-ghest tensile strength and elongation at break, the worst compression set and oil resistance. The scorch time, curing speed and tensile strength of the compound from BIPB were in the middle of the first two, with the minimum compression set and worst hot air aging resistance, the Mooney viscosity increment was equivalent to that from DHBP, and other physical and mechanical properties and oil resistance were equivalent to that from DCP.

Keywords

• hydrogenated nitrile rubber
• curing agent
• mooney viscosity
• curing characteristics
• physical and mechanical property
• aging resistance
• oil resistance