The influence of the stable radical of 4,4′-dimethoxydiphenyl nitroxide on the polymerization of styrene and methyl methacrylate initiated by benzoyl peroxide has been investigated. It is shown that the nitroxide radical and benzoyl peroxide interact and form aminoquinones that inhibit the polymerization. The mechanism of this interaction is discussed. The stoichiometric coefficients, and the rate constants and activation energies of the inhibition reactions have been found. © 1984.
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