DEFFIEUX, Alain; CARLOTTI, Stéphane; DESBOIS, Philippe

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DEFFIEUX, Alain
Laboratoire de Chimie des polymères organiques [LCPO]

CARLOTTI, Stéphane
Laboratoire de Chimie des polymères organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering

DESBOIS, Philippe
Polymer Laboratory [BASF]

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Article de revue

Ce document a été publié dans

Macromolecular Symposia. 2005, vol. 229, p. 24-31

Wiley-VCH Verlag

Résumé en anglais

Control of the reactivity and selectivity of active species remains a major challenge in the course of living/controlled polymerizations of vinyl and heterocyclic monomers. we have found that alkyl metal derivatives such as dialkylmagnesium or trialkylaluminum derivatives or the corresponding alkoxyakyl metal derivatives, when added to conventional anionic polymerization systems, are very effective mediators for the controlled anionic polymerization of both styrenic and oxirane monomers. When used as additives to alkali metal alkyl initiators (alkyl lithium, alkyl sodium) for the styrene anionic polymerizations, they strongly retard the reactivity of the propagating species and allow controlling the polymerization in very unusual conditions (bulk, very high temperature). On the contrary, when used in combination to the same alkali metal based initiators for the anionic polymerization of ethylene oxide or propylene oxide, these additives can drastically enhance the reactivity and the selectivity of the propagating species allowing a fast living-like polymerization to proceed already at low temperature in hydrocarbon media.< Réduire

Mots clés en anglais

SYSTEM

REACTIVITY

STYRENE

POLYSTYRYLLITHIUM

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New perspectives in living/controlled anionic polymerization

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Résumé en anglais

Mots clés en anglais

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