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Abstract
The mechanism of reactions of nitrogen oxides with various solid polymers has been considered. The active participants of the reactions with nitrogen oxides are double bonds, amide groups of macromolecules and peroxy macroradicals. The reactions of nitrogen oxides provide a simple way for the preparation of spin labeled polymers. The structure of the reaction front during nitration of polyisoprene has been studied using the ESR tomography technique. The structural-physical effect on kinetics and mechanism of reactions of nitrogen oxides has been demonstrated by the example of filled polyvinylpyrrolidone.