Effect of Carbon Black on the Development of Oxidation Processes in Raw and Vulcanized Rubbers

Abstract

Publications by Rebinder, Ab, and Vei˘ler, Pisarenko and Rebinder, and Dogadkin, Pechkovskaya, and Chernikina have been devoted to an explanation of the mechanism of the accelerating action of carbon blacks. However, only fragmentary and contradictory information about the influence of carbon blacks on the development of oxidation processes is found in scientific literature. In the present article, several important laws regarding the role of channel carbon black in the oxidation of sodium-butadiene rubber are studied. Carbon black can be incorporated in rubber in high proportions (100–125 parts by weight to 100 parts of rubber). It is well known how great is the influence of the surface area of reaction vessels in which the rupture of chains takes place on the development of chain reactions. It is also known that the oxidation of any type of rubber is a chain process of decomposition, with formation of side chains. Therefore in the study of these processes in rubbers, it is necessary to take into account the highly developed surface of contact between the carbon black and rubber particles.