Abstract
Mixing effect on polymerisation reactions is known to have a strong influence on the Molecular Weight Distribution (MWD). Manufacturing polymers with specific properties such as MWD is a current issue for designing and driving industrial reactors. Actually, MWD is deeply dependant on mixing level at different scales in the reactor. This chapter highlightsa computational method that is capable to predict thermal and mixing effects on the MWD shape of a polymer. Practically, the studied case is anionic polymerisation of styrene which is carried out in a coaxial jet stirred tank without premixing system. The demonstration consists in comparing computational results of two completely different flow operating conditions driven on the same reactor. Computational results allow to predict the dispersion of MWD for both flows. Besides, results have brought to the fore undesired phenomena such as local hot point in recirculation loop, or the presence of very long chains next to the wall for less tormented flows.
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