Abstract
AbstractThe simultaneous action of olefin copolymers (with (DOCP) or without (OCP) a dispersant function) and an ashless dispersant, polyisobutylene (PIB) succinimide, on the aggregation kinetics of carbon black (CB) suspensions, chosen to model sootladen oils, has been studied. It was observed that OCP or DOCP alone does not stabilise the suspensions, whereas the presence of PIB succinimide alone stops aggregation after one hour, during which, however, a slight increase in the mean size of the aggregates is noticeable. The addition of OCP or DOCP to PIB succinimide does not modify the long‐term stabilisation of the suspension, but avoids the slight increase in the mean size of the aggregates observed during the first hour after the addition of PIB succinimide.
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