Article (Scientific journals)
Cobalt-mediated radical polymerization of acrylonitrile: Kinetics investigations and DFT calculations
Debuigne, Antoine; Michaux, Catherine; Jérôme, Christine et al.
2008In Chemistry, 14 (25), p. 7623-7637
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Keywords :
radical polymerization; cobalt-mediated radical polymerization (CMRP); acrylonitrile
Abstract :
[en] The successful controlled homopolymerization of acrylonitrile (AN) by cobalt-mediated radical polymerization (CMRP) is reported for the first time. As a rule, initiation of the polymerization was carried out starting from a conventional azo-initiator (V-70) in the presence of bis(acetylacetonato)cobalt(II) ([Co(acac)2]) but also by using organocobalt(III) adducts. Molar concentration ratios of the reactants, the temperature, and the solvent were tuned, and the effect of these parameters on the course of the polymerization is discussed in detail. The best level of control was observed when the AN polymerization was initiated by an organocobalt(III) adduct at 0 °C in dimethyl sulfoxide. Under these conditions, poly(acrylonitrile) with a predictable molar mass and molar mass distribution as low as 1.1 was prepared. A combination of kinetic data, X-ray analyses, and DFT calculations were used to rationalize the results and to draw conclusions on the key role played by the solvent molecules in the process. These important mechanistic insights also permit an explanation of the unexpected solvent effect that allows the preparation of well-defined poly(vinyl acetate)-b-poly(acrylonitrile) by CMRP.
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Debuigne, Antoine  ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Michaux, Catherine;  Facultés Universitaires Notre-Dame de la Paix (FUNDP), Namur, Belgium > Chimie Biologique Structurale lab, CPTS group
Jérôme, Christine  ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Jérôme, Robert ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Poli, Rinaldo;  UPR CNRS 8241 lié par convention à l’Université Paul Sabatier et à l’Institut National Polytechnique de Toulouse, France > Laboratoire de Chimie de Coordination
Detrembleur, Christophe ;  Université de Liège - ULiège > Department of chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Cobalt-mediated radical polymerization of acrylonitrile: Kinetics investigations and DFT calculations
Publication date :
28 August 2008
Journal title :
Chemistry
ISSN :
0947-6539
eISSN :
1521-3765
Publisher :
Wiley
Volume :
14
Issue :
25
Pages :
7623-7637
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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