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Inhibition of Polyethylene and Polypropylene Oxidation by Nitro Compounds Reacting with Alkyl and Peroxy Radicals

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Abstract

The kinetics of chain termination in polypropylene and polyethylene oxidation inhibited by 2,4-dinitrololuene is studied. 2,4-Dinitrololuene inhibits the oxidation of polyethylene and polypropylene lacking hydroperoxide groups by terminating chains in the reaction with alkyl macroradicals. In oxidized polypropylene containing hydroperoxide groups, chain termination on 2,4-dinitrololuene involves both alkyl and peroxy radicals. A cyclic mechanism is proposed for chain termination in partially oxidized polypropylene involving HO2 ·and nitroxyl radicals formed from 2,4-dinitrololuene.

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    Yu. B. Shilov & E. T. Denisov

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  1. Yu. B. Shilov
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  2. E. T. Denisov
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Shilov, Y.B., Denisov, E.T. Inhibition of Polyethylene and Polypropylene Oxidation by Nitro Compounds Reacting with Alkyl and Peroxy Radicals. Kinetics and Catalysis 42, 238–242 (2001). https://doi.org/10.1023/A:1010421502922

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