Studies on Abrasion and Wear of Rubber. I. The Chemistry of Carbon Black and Its Effect on Abrasion as Determined by the National Bureau of Standards Method

Abstract
A series of carbon blacks of approximately constant surface area were prepared by heating a strongly acidic carbon black in N2 in the range of 200–1000° C. Their adsorption capacity for alkali and acid, catalytic behavior in H2O2 decomposition, and magnetic susceptibility have been studied and related to their effect on abrasion resistance when incorporated into a standard tire tread stock in the absence of antioxidants. It is suggested that there are, at least, two distinct chemical mechanisms by which carbon blacks can produce reinforcement, that is, by their (irreversible) action as polyphenol type antioxidants (acidic = low-temperature blacks), or in a catalytic (reversible) fashion through temporary stabilization of broken rubber chains on their surface (neutral = medium-temperature blacks).

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