ゴム粉〜マトリックスゴム界面近傍での硫黄移行現象と自由体積の不連続性-2-

概要

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Discontinuity of crosslink density due to diffusion of sulfur near the interface between comminuted and matrix rubber has been assumed to be dependent on the vulcanization speed in the rubber matrix. The discontinuity has been studied by X-ray microprobe analysis (XMA) and freezing point depression of solvent for a model specimen with layered vulcanized rubber and unvulcanized rubber filled with various kinds of accelerators. Crosslink density in the vulcanized and the unvulcanized rubber after curing is highly dependent on the vulcanization speed in the latter or in the matrix rubber. The higher the vulcanization speed in the matrix rubber the discontinuity becomes the smaller. The tensile strength of vulcanizates filled with comminuted vulcanizates is found to increase with a decrease in the discontinuity.
日本ゴム協会の論文