Effect of stannous octoate on the thermal decomposition of 2,2′‐azobis(isobutyronitrile)
Identifieur interne : 000300 ( France/Analysis ); précédent : 000299; suivant : 000301Effect of stannous octoate on the thermal decomposition of 2,2′‐azobis(isobutyronitrile)
Auteurs : Mohamed Tahar Tabka [France, Tunisie] ; Jean-Marc Chenal [France] ; Jean-Michel Widmaier [France]Source :
- Polymer International [ 0959-8103 ] ; 2000-04.
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Abstract
The thermal decomposition rate constant kd of 2,2′‐azobis(isobutyronitrile) (AIBN) in ethyl acetate was determined at 60 °C in the presence of various amounts of stannous octoate (SnOc2). The kd values were found to be dependent on the concentration of SnOc2 in the solution. This dependence is not a linear function of the concentration because kd goes through a maximum when [SnOc2]/[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 SnOc2. This complex induces steric constraints in the azo bond of AIBN, thus increasing its rate of decomposition. © 2000 Society of Chemical Industry
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DOI: 10.1002/(SICI)1097-0126(200004)49:4<412::AID-PI395>3.0.CO;2-J
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ISTEX:524EDE3CDFD7EABA99F46B2F2C29C3027636900BLe document en format XML
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Int.</title><idno type="ISSN">0959-8103</idno><idno type="eISSN">1097-0126</idno><imprint><publisher>John Wiley & Sons, Ltd.</publisher><pubPlace>Chichester, UK</pubPlace><date type="published" when="2000-04">2000-04</date><biblScope unit="volume">49</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="412">412</biblScope><biblScope unit="page" to="416">416</biblScope></imprint><idno type="ISSN">0959-8103</idno></series><idno type="istex">524EDE3CDFD7EABA99F46B2F2C29C3027636900B</idno><idno type="DOI">10.1002/(SICI)1097-0126(200004)49:4<412::AID-PI395>3.0.CO;2-J</idno><idno type="ArticleID">PI395</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0959-8103</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>AIBN</term><term>complexation</term><term>free‐radical initiator</term><term>organometallics</term><term>stannous octoate</term><term>thermal decomposition</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The thermal decomposition rate constant kd of 2,2′‐azobis(isobutyronitrile) (AIBN) in ethyl acetate was determined at 60 °C in the presence of various amounts of stannous octoate (SnOc2). The kd values were found to be dependent on the concentration of SnOc2 in the solution. This dependence is not a linear function of the concentration because kd goes through a maximum when [SnOc2]/[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 SnOc2. 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