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Abstract

A new phenomenon in graft polymerization has been investigated: the complexing of growing radicals with copper ions. Graft polymerization of methacrylic acid to polycaproamide, initiated by the reversible K2S2O8–Na2S2O3 redox system in the presence of copper ions, is used as an illustration to show that the complexing of growing radicals with copper ions significantly enhances their activity. The concepts of the graft polymerization mechanism have been formulated.