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Kinetics of the thermal oxidation of butadiene–acrylonitrile copolymer

✍ Scribed by Beachell, Harold C. ;Spitsbergen, James C.

Publisher
John Wiley and Sons
Year
1962
Weight
400 KB
Volume
62
Category
Article
ISSN
0022-3832

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✦ Synopsis

Abstract

The thermal oxidative degradation of an inhibited butadiene–acrylonitrile copolymer has been studied kinetically by means of infrared spectroscopy and color formation in the temperature range 100–200°C. In this type of degradation hydroxyl‐ and carbonylcontaining groups are formed from the decomposition of hydroperoxide or hydroperoxide radicals. The carbonyl groups are ketonic, resulting from a vinyl ketone initially formed by oxidative attack on the tertiary hydrogen and from a competing attack on α‐hydrogen. The interaction of the product of the latter competing reaction forms an intermediate, the decomposition of which requires an activation energy of 18 kcal./mole and yields a carbonyl and hydroxyl group. The radicals and hydroperoxides may also react to give either scission or aggregation. The oxidative products from these reactions give many types of oxygenated groups and radicals.

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