Kinetic Modeling of Thermal Decomposition of Halogenated Flame Retardants

摘要

This work presents detailed kinetic mechanisms of the thermal decomposition of flame retardants both macromolecules and additives. These models provide weight loss curves of PVC and polychloroprene (PCP), and above all the distribution of primary and minor products. These degradation mechanisms proceed via chain radical reactions but also molecular reactions play a significant role. These models refer to a limited set of reference pseudo-species representative of the very large amount of compounds involved in the system and take advantage of analogy and similarity rules for the determination of the rate constants. Finally, the mechanism of thermal decomposition of BTBPE [1,2-bis(2,4,6-tribromophenoxy)ethane] is described by a quite simple kinetic model, which is able to predict the pyrolysis products, mainly tribromophenol and vinyl-tribromophenyl-ether.