Titre :

Coordinative Chain Transfer Polymerization of Butadiene Using Nickel(II) Allyl Systems: A Straightforward Route to Branched Polybutadiene

Auteur(s) :

Garcia Bravo, Catarina [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Merle, Nicolas [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Sauthier, Mathieu [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Bria, Marc [Auteur]
Centre Commun de Mesure de RMN
De Winter, Julien [Auteur]
Université de Mons / University of Mons [UMONS]
Zinck, Philippe [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Titre de la revue :

Macromolecules

Numéro :

56

Pagination :

8106–8115

Éditeur :

American Chemical Society (ACS)

Date de publication :

2023-10-24

ISSN :

0024-9297

Mot(s)-clé(s) en anglais :

Butadiene
Catalysts
Hydrocarbons
Nuclear magnetic resonance spectroscopy
Polymerization

Discipline(s) HAL :

Chimie/Catalyse

Résumé en anglais : [en]

Nickel allyl complexes are catalysts for the 1,4-regioselective polymerization of butadiene (BD). Coordinative chain transfer polymerization (CCTP) was not yet assessed by using these systems. We report in this work the ...
Lire la suite >Nickel allyl complexes are catalysts for the 1,4-regioselective polymerization of butadiene (BD). Coordinative chain transfer polymerization (CCTP) was not yet assessed by using these systems. We report in this work the polymerization of butadiene in the presence of π-allyl Nickel(II) trifluoroacetate (TFA) and MgnBuEt or AlEt3 as chain transfer agent (CTA) case studies. The reaction follows a first-order kinetic versus the monomer. Chain transfer is evidenced in the presence of CTAs, together with the formation of polybutadiene bearing a conjugated diene moiety. This allows one-pot access to branched polybutadiene by reinsertion of the chains. The branching is quantitatively analyzed by 13C NMR after hydrogenation of the polybutadiene, and its impact on the thermal properties of the hydrogenated samples is assessed, in particular for low degrees of branching that cannot be quantitatively determined. A full description of the catalytic cycle is tentatively provided. If similar tandem processes were described in the literature in the course of the polymerization of ethylene, it is, as far as we know, the only system reported so far for a conjugated diene leading to branched polybutadiene thus extending the range of application of CCTP processes.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

Catalyse et synthèse éco-compatible (CASECO)

Date de dépôt :

2023-10-31T00:44:34Z
2023-11-07T16:07:42Z