Abstract
In order to optimise the experimental conditions for the recycling of plastic wastes, we have modelled the thermal degradation process of a standard polystyrene having a low polydispersity index. The number of initial ruptures, N 0, in the macromolecular chain during pyrolysis at 350 °C under nitrogen pressure is determined from the gel permeation chromatography results from experiments with tetralin as hydrogen donor solvent, assuming that all radicals have been stabilised by this solvent. The calculation shows that there are 23 depropagation reactions, 40 intramolecular transfers, and for n intermolecular transfers. n − 2 recombinations and N 0 − n + 2 dismutations.
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