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Decomposition of polypropylene hydroperoxides induced by nitric oxide: New concept of reaction mechanism
Author(s) -
Gaponova I. S.,
Pariiskii G. B.,
Zaikov G. E.
Publication year - 2001
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20010418)80:3<407::aid-app1113>3.0.co;2-o
Subject(s) - polypropylene , decomposition , chemistry , radical , reaction mechanism , oxide , decane , polymer chemistry , nitrogen , impurity , chemical decomposition , nitric acid , organic chemistry , catalysis
NO‐induced decomposition of hydroperoxides in solid polypropylene and cumyl hydroperoxide, dissolved in n ‐decane, at 25°C was studied. Analysis of kinetic regularities of hydroperoxide decomposition and nitroxide radical accumulation leads to the conclusion that both in solids and in solutions these reactions have the autoaccelerated character. The induction periods are determined by trace amounts of impurities (probably of higher nitrogen oxides).The maximum rate of the process depends on the NO pressure. The possible reaction mechanisms are supposed, and the key role is assigned to the formed nitrosocompounds. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 407–414, 2001