エチレン-プロピレンゴムのオキシムと酸化剤による橋かけ

概要

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The mechanism of the curing reaction of ethylene-propylene rubber with various curing systems such as p-quinone dioxime-chloranil and p-quinone dioxime-lead dioxide was studied.<BR>The crosslinking reactions with the oxime compounds-oxidizing agents system were different from those with dicumyl peroxide-oxime compounds system. It seems that p-dinitroso benzene produced by oxidation of oxime caused the crosslinking reaction. When chloranil was used as additive, the cured rubber had a tenddency to bloom and to stick to the mold. In the oxime compounds-lead dioxide curing system, the stocked rubber had a tendency to scorch and the cured substances were foamed. And when lead dioxide was used in the dicumyl peroxide cure of EPDM, the crosslinking reaction rate was accelerated.