Reference : Cobalt-mediated radical polymerization of vinyl monomers: investigation of cobalt-coordi...
Scientific congresses and symposiums : Poster
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/25200
Cobalt-mediated radical polymerization of vinyl monomers: investigation of cobalt-coordination
English
Debuigne, Antoine mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Piette, Yasmine [University of Liège (ULg) > Department of Chemistry) > Center for Education and Research on Macromolecules (CERM) > >]
Poli, Rinaldo [University of Toulouse, France > > Laboratoire de Chimie de Coordination > >]
Jérôme, Christine mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Jérôme, Robert mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Detrembleur, Christophe mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
17-Sep-2009
No
No
International
Meeting on Controlled Radical Polymerization (CRP Meeting 2009) "Controlled/Living Radical Polymerizations: Latest trends in Synthesis, Characterization and Industrial Applications"
17/09/2009 - 18/09/2009
P. Dubois, F. Du Prez, C. Barner-Kowolik
Houffalize
Belgium
[en] radical polymerization ; cobalt-mediated radical polymerization (CMRP)
[en] Controlled Radical Polymerization techniques have been developed to obtain well-defined architectures and to control polymer parameters. Among these systems is Cobalt-Mediated Radical Polymerization (CMRP), which is based on the reversible deactivation of the growing radical chains with a cobalt complex, the cobalt (II) bis(acetylacetonate). The interest of this system is not only due to its ability to control the polymerization of very reactive monomers such as vinyl acetate (VAc) and N-vinylpyrrolidone (NVP), but also its peculiar mechanism which exhibits two pathways depending on the polymerization conditions; a reversible termination process and a degenerative chain transfer mechanism. Furthermore, it has been showed that the Co-C bond strength and thus the polymerization are strongly influenced by the use of some additives, such as water, dimethylformamide, dimethylsulfoxide and pyridine, which coordinate the cobalt free site.
In this presentation we report the use of a preformed alkyl-cobalt(III) adduct as initiator for the polymerization of various vinyl monomers of different reactivity (VAc, acrylonitrile,…) and on the effect of several ligands on their polymerization control. The preparation of novel block copolymers by CMRP will finally be presented.
As a conclusion, cobalt-coordination appears today as a unique opportunity to adjust the Co-C bond strength and to push back the bounds of possibilities in terms of macromolecular engineering assisted by CMRP.
Center for Education and Research on Macromolecules (CERM)
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy
Researchers
http://hdl.handle.net/2268/25200

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