Inhibited Oxidation of Cumene and Polymerization of Styrene Investigated by Solution Microcalorimetry

The application of solution microcalorimetry was demonstrated on two model examples – inhibited oxidation of cumene and radical polymerization of styrene.From the experimental dependences of the rate of heat release on time, the rate constants k ₇ of the interaction of an inhibitor with radicals of substrate (RO ₂ ^. or R^.) in oxidation or in polymerization were determined for the set of inhibitors of N-aryl N-(2-quinone) amine series. It was shown that these compounds are weak inhibitors of oxidation of cumene and rather efficient inhibitor of polymerization of styrene.This revised version was published online in November 2005 with corrections to the Cover Date.