聚丙烯及聚丙烯模型化合物中过氧自由基的衰变常数:动力学ESR研究

Polymer Photochemistry Pub Date : 1986-01-01 DOI:10.1016/0144-2880(86)90018-7

A. Faucitano , A. Buttafava , F. Martinotti , V. Comincioli , P. Bortolus

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引用次数: 6

摘要

用动力学ESR法测定了无规聚丙烯(PP)生成的过氧自由基以及PP模型化合物和PP自氧化产物的相互复合的速率常数和活化能。确定了过氧自由基的类型和t-丁氧基自由基吸氢的首选攻击位点。研究结果对聚丙烯自氧化的机理和动力学模拟具有重要意义。

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Decay constants of peroxy radicals from polypropylene and polypropylene model compounds: A kinetic ESR study

The rate constants and the activation energy for the mutual recombination of peroxy radicals generated from atactic polypropylene (PP) and for model compounds of PP and PP autoxidation products have been determined by kinetic ESR. The type of peroxy radicals and the preferred sites of attack for the hydrogen abstraction by t-butoxyl radicals were identified. The results are of interest in respect to the mechanism and the kinetic simulation of PP autoxidation.

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