酸化剤とオキシムによる各種ポリマーの橋かけ

概要

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The mechanism of cure of various rubbers with oxime compounds, was studied. The cure systems included dicumyl peroxide-p-quinone dioxime, chloranil-p-quinone dioxime and lead dioxide-p-quinone dioxime. The effects of p-quinone dioxime in the curing reaction of the various rubbers were also studied. From the results, it was found that : (1) On peroxide cure, the oxime compounds retarded the cures of diene rubber and polythylene, while the oxime compounds accelerated the cures of butyl rubber and EPM. In the case of EPDM, the action of oxime compounds was different from above cases and the cure rate of EPDM depended on the quantity of peroxide used. (2) When chloronil and lead dioxide were used as crosslinking additives, the oxime compounds accelerated only the cure rate. In the case of saturated polymers such as EPM and polyethylene, the curing of these polymers was attempted but failed.