Chemiluminescence from the thermal oxidation of polyisoprene and polybutadiene I. Influence of oxygen pressure on the chemiluminescence of polyisoprene during its oxidation |
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Authors: | J. Verdu L. Audouin J. Rychly |
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Affiliation: | a LTVP/LIM, ENSAM, 151 Boulevard de l'Hôpital, 75013 Paris, France b Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 842 36 Bratislava, Slovak Republic |
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Abstract: | The influence of oxygen pressure p (0.016-0.1 MPa) on polyisoprene thermal oxidation at 100 °C has been studied by chemiluminescence (CL). The maximum CL intensity was found to be almost proportional to p, whereas the induction time is influenced in the same way but to a lesser extent. Assuming that the classical mechanistic scheme with initiation by bimolecular hydroperoxide decomposition and termination by bimolecular radical combination, partially studied by Tobolsky and co-workers in the 1950s, is valid, it was established that chemiluminescence originates essentially from hydroperoxide decomposition. A theory which tries to reconcile this result with the most popular hypothesis according to which light is emitted by terminating peroxyl bimolecular combination is proposed. |
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Keywords: | Polyisoprene Oxidation Kinetics Chemiluminescence |
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