CARLOTTI, Stéphane; LABBÉ, Amélie; REJSEK, Virginie; DOUTAZ, Stéphane; GERVAIS, Matthieu; DEFFIEUX, Alain

doi:10.1021/ma801422c

Métadonnées

Licence d’utilisation du document

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

LABBÉ, Amélie
Laboratoire de Chimie des polymères organiques [LCPO]

REJSEK, Virginie
Laboratoire de Chimie des polymères organiques [LCPO]

Langue

Article de revue

Ce document a été publié dans

International Journal of Biological Macromolecules. 2008, vol. 41, n° 19, p. 7058-7062

Elsevier

Résumé en anglais

A weakly nucleophilic initiating system obtained by the combination of triisobutylaluminum and tetraoctylammonium bromide has been successfully used to achieve the controlled polymerization of epichlorohydrin (ECH) in hydrocarbon at temperatures ranging from -30 degrees C to room temperature. Besides the formation of a 1:1 aluminate complex of low nucleophilicity between the aluminum derivative and the tetraalkylammonium salt, the strategy consists of the formation of a strongly activating complex between the Lewis acid and the epoxide monomer. To that aim trialkylaluminum is added in slight excess with respect to the tetraalkylammonium salt ([i-BU3Al]/[NOct(4)Br] > 1). In these conditions the reactivity of ECH toward nucleophiles is strongly enhanced and the ring opening polymerization proceeds in the presence of weak nucleophiles leading to nonreacted chloromethyl function of the epichlorohydrin. This contrasts with conventional anionic polymerization, which requires much stronger nucleophiles for the ring opening. Fast and controlled polymerization of ECH up to high molar masses and the synthesis of random and block copolymers with propylene oxide were readily achieved.< Réduire

Mots clés en anglais

POLYMERS

EPOXIDES

ALKYLENE OXIDES

CATALYST SYSTEM

CONDUCTIVITY

PROPYLENE-OXIDE

ETHYLENE-OXIDE

SOLID-ELECTROLYTE

MONOMER

Métadonnées

Partager cette publication !

Licence d’utilisation du document

Living/controlled anionic polymerization and copolymerization of epichlorohydrin with tetraoctylammonium bromide-Triisobutylaluminum initiating systems

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

URI

DOI

Origine

Unités de recherche