The effects of copper, mercury, nickel, zinc, cadmium, indium, magnesium, and calcium stearates on the course of N ‐cyclohexyl‐2‐benzthiazylsulphenamide‐accelerated sulfur vulcanization of natural rubber have been investigated on the basis of curemeter measurements at 145°C. The differences in the efficiencies of these metal activators of accelerated sulfur vulcanization have been discussed from the points of view of the electron configurations of the metals and their affinities to sulfur. We attempted to determine why zinc oxide is generally accepted as the best metal vulcanization activator.
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Ducháček et al. (1993) studied this question.
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