caa a22 4500 445384689 CHVBK 20180317143028.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10924-010-0261-5 doi (NATIONALLICENCE)springer-10.1007/s10924-010-0261-5 Ion-Radical Conversions in Main or Side Chains of Nitrogen-Containing Polymers in Nitrogen Dioxide Atmosphere [Elektronische Daten] [Evgeny Davydov, Irina Gaponova, Tatiana Pokholok, Georgy Pariiskii] Mechanism of nitrogen dioxide interaction with polymers containing amide and imide groups in the main or side chains of macromolecules (polycaproamide, polyvinylpyrrolidone, poly-m-phenylene isophthalamide and polypyromellitimide) is considered. The initiators of conversions of polymers of the given classes are not monoradicals of nitrogen dioxide rather than its equilibrium dimers in the form of nitrosyl nitrate. In primary oxidizing reaction of an electron transfer from donor groups of macromolecules to nitrosyl nitrate, radical cations, nitric oxide and nitrate anion are formed, which in the subsequent reactions give products of nitration and nitrosation. These products are precursors of stable acylalkylaminoxyl, acylarylaminoxyl, iminoxyl macroradicals. The specific interactions of nitrogen dioxide dimers with functional groups of macromolecules determine features of the mechanism of ion-radical conversions of the polymers and the composition of radical and molecular products. The direct detection of radical cations has been realized by ESR method for confirmation of the ion-radical initiation concept using model reaction of nitrogen dioxide with triphenylamine. Springer Science+Business Media, LLC, 2010 Nitrogen dioxide nationallicence Nitrosyl nitrate nationallicence Polyamides nationallicence Polyimides nationallicence Stable radicals nationallicence ESR spectra nationallicence Davydov Evgeny Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin St., 119334, Moscow, Russia aut Gaponova Irina Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin St., 119334, Moscow, Russia aut Pokholok Tatiana Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin St., 119334, Moscow, Russia aut Pariiskii Georgy Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin St., 119334, Moscow, Russia aut Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/1(2011-03-01), 312-327 1566-2543 19:1<312 2011 19 10924 https://doi.org/10.1007/s10924-010-0261-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10924-010-0261-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Davydov Evgeny Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin St., 119334, Moscow, Russia aut NATIONALLICENCE 700 1- Gaponova Irina Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin St., 119334, Moscow, Russia aut NATIONALLICENCE 700 1- Pokholok Tatiana Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin St., 119334, Moscow, Russia aut NATIONALLICENCE 700 1- Pariiskii Georgy Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin St., 119334, Moscow, Russia aut NATIONALLICENCE 773 0- Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/1(2011-03-01), 312-327 1566-2543 19:1<312 2011 19 10924 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer