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Effects of microscopic disorder in a simple model for polymerization through heterogeneous catalysis

par Dab, David ;Tribel, Olivier ;Nicolis, Grégoire ;Promel, M.
Référence Physical Review Letters, 74, 5, page (824-827)
Publication Publié, 1995

Article révisé par les pairs

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Résumé :

An important source of controversy concerning the polymerization of olefins through heterogeneous catalysis is the cause of the broad molecular weight distribution (MWD) observed even when the polymer is prepared at constant monomer concentration. In this Letter we show that, apart from the usually invoked chemical and physical mechanisms, additional phenomena related to microscopic disorder could contribute to the MWD broadening. A schematic microscopic model illustrates the argumentation. The extent to which microscopic disorder contributes to the MWD broadening in a real system is discussed. © 1995 The American Physical Society.