Reactions of nitrogen oxides with polymers

Abstract

The mechanisms of the reactions of nitrogen oxides and The mechanisms of the reactions of nitrogen oxides and different classes of solid polymers are considered. Particular different classes of solid polymers are considered. Particular emphasis is given to the analysis of the mechanisms of the emphasis is given to the analysis of the mechanisms of the formation of stable nitroxyl radicals. Double bonds and amide formation of stable nitroxyl radicals. Double bonds and amide groups of macromolecules, as well as hydroperoxides and per-groups of macromolecules, as well as hydroperoxides and peroxide macroradicals are shown to be involved in the reactions with oxide macroradicals are shown to be involved in the reactions with nitrogen oxides. The application of nitrogen oxides for the nitrogen oxides. The application of nitrogen oxides for the preparation of spin-labelled polymers and the use of the ESR preparation of spin-labelled polymers and the use of the ESR imaging technique (ESR tomography) for the investigation of the imaging technique (ESR tomography) for the investigation of the structure of the reaction front during nitration of solid polymers structure of the reaction front during nitration of solid polymers are considered. The bibliography includes 111 references are considered. The bibliography includes 111 references. .

Gas release in energetic compositions with an active fuel binder on exposure to ionizing radiation

“…It has been shown [16] that radiolysis of polyester urethane produces only CO 2 , CO, and H 2 with a radiation-chemical yield of 1.0, 0.14, and 0.18 molecules per 100 eV absorbed energy, respectively; the main initial product of radiolysis of the active polymer binder -NO 2 -is released from the nitrate ester plasticizer. As shown in [17], the interaction of NO 2 with the urethane groups of polymer macromolecules at room temperature produces CO 2 . However, during irradia- tion of composition S1, this effect is not observed: The concentration of the CO 2 formed almost coincides with its value calculated on the basis of the mass fraction of polyester urethane in the binder.…”

Towards Supramolecular Fixation of NOX Gases: Encapsulated Reagents for Nitrosation

“…Although a wide variety of polymers is now commercially available, NO 2 / N 2 O 4 (and also other NO X ) react with many of them, causing destruction and aging. [28] As a free radical NO 2 readily attacks double bonds in polybutadienes, polyisoprenes and their copolymers, ester groups in poly(methyl)methacrylate, and also amide fragments in polyamides and polyurethanes. Furthermore, NO + , generated from various NO X , reacts with alkenes and other doublebond-containing structures.…”

Supramolecular Chemistry of Gases

“…A variety of polymers are commercially available, but NO 2 /N 2 O 4 (and also other NO X ) react with many of them, causing destruction and aging (77). As a free radical, NO 2 aggressively attacks double bonds in polybutadiene, polyisoprene and their copolymers, ester groups in poly(methyl methacrylate) (PM MA), and also amide fragments in polyamides and polyurethanes.…”