Abstract
Abstract An express method for determination of the efficiency of antiozonants, based on their inhibiting effect towards ozone degradation of elastomers in solution, is proposed. An efficiency coefficient of the antiozonant was defined as a ratio between the amount of ozone consumed in an elastomer solution containing antiozonant and the amount of ozone that reacted in a solution without antiozonant, through which an equal decrease in the relative viscosity of both the solutions is attained. A stoichiometry coefficient of the protection effect can be determined by monitoring the changes in inhibiting activity of the antiozonants during their ozone conversion. The proposed method was demonstrated in the study of the inhibiting effect of the N-phenyl-N′-isopropyl-p-phenylenediamine, polimerised 1,2-dihydro-2,2,4-trimethylquinoline and tributhylthiourea antiozonants.
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