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Cyclization of polyenes in degraded PVC

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Abstract

Reactive polyenes developing during the thermal degradation of PVC isomerize in an intramolecular cyclization process with the formation of cyclohexadiene ring-structures. Therefore, the concentration of polyenes reaches a steady-state value in the course of degradation. The dependence of polyene concentration on the extent of dehydrochlorination can be readily described by the kinetic treatment performed on the basis of cyclization.

Abstract

Реактивные полиены, образуюЩиеся в термической деградации ПВХ, изомеризуются в дроцессе внутримолекыл ярной циклизации с образованием циклогексадиеновых кольцевых структур. Вследствие этого концентрация полиенов становится стационарной в ходе деградации. Зависимость концентрации полиенов от степени дегидрохлоринирринирования может быть описана с помоЩяю кинетической схемы, основанной на продессе циклизации.

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Kelen, T., Nagy, T.T. & Tüdős, F. Cyclization of polyenes in degraded PVC. React Kinet Catal Lett 1, 93–97 (1974). https://doi.org/10.1007/BF02075127

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  • DOI: https://doi.org/10.1007/BF02075127

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