Chemical relaxation of natural rubber vulcanizates crosslinked with diurethanes

Peroxide Vulcanisation of Hydrogenated Butadiene–Acrylonitrile Rubber

“…The kinetics of the vulcanisation process was studied from rheometric curves taken on a Monsanto instrument (model ODR 2000) in accordance with the GOST 12535-84 standard. To determine the parameters of the processes of structure formation and degradation that occur during vulcanisation, use was made of a method based on the Sheele equation [2], with account taken of an analytical method developed earlier [3,4]. The crosslink density of the HBAR-based vulcanisates obtained was determined from data of equilibrium swelling in benzene (GOST 9.030-74) at a temperature of 23 ± 2°C.…”