IR/BR系ブレンドのバウンドラバー-1-ロールミル法によるカーボンブラックの混合

概要

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IR and BR were blended by openemill mixing and the bound rubber obtaiabie was analyzed by means of pyrolysis gas chromatography. When HAF black was added to the preblend of IR/BR, the BR component in the bound rubber was a little larger than the IR component and both components increased with mixing time. When EPC black was added to the preblend of IR/BR, IR occupied a relatively large part of the bound rubber at the first stage of mixing and then it decreased notably as the mixing time increased so that the IR component became less than the BR component. When IR was added to a BR masterbatch, the resulting bound rubber was composed in the great part of BR and hardly of IR. In an early mixing time the blending of IR formed of bound rubber with a constant volume, whose value was higher under the EPC loading than under the HAF loading. Addition of HAF blacks treated thermally showed that bound rubber was independent of the surface acidity of HAF black.
日本ゴム協会の論文