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Effect of stannous octoate on the thermal decomposition of 2,2′‐azobis(isobutyronitrile)
Author(s) -
Tabka Mohamed Tahar,
Chenal JeanMarc,
Widmaier JeanMichel
Publication year - 2000
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(200004)49:4<412::aid-pi395>3.0.co;2-j
Subject(s) - thermal decomposition , chemistry , steric effects , nitrile , decomposition , reaction rate constant , polymer chemistry , organic chemistry , kinetics , physics , quantum mechanics
The thermal decomposition rate constant k d of 2,2′‐azobis(isobutyronitrile) (AIBN) in ethyl acetate was determined at 60 °C in the presence of various amounts of stannous octoate (SnOc 2 ). The k d values were found to be dependent on the concentration of SnOc 2 in the solution. This dependence is not a linear function of the concentration because k d goes through a maximum when [SnOc 2 ]/[AIBN] = 1. These features were explained by assuming the formation of a 1:1 cyclic complex between the nitrile groups of AIBN and the tin atom of SnOc 2 . This complex induces steric constraints in the azo bond of AIBN, thus increasing its rate of decomposition. © 2000 Society of Chemical Industry