Lanthanides benzimidinates: initiators or real catalysts for the ε-caprolactone polymerization

Lanthanides benzimidinates: initiators or real catalysts for the ε-caprolactone polymerization

Lanthanides (samarium and ytterbium) tris and monobenzimidinates are efficient for the polymerization of ε‐caprolactone, the systems remaining active after consumption of the monomer. Nevertheless it is not a living polymerization because the benzimidinates are recovered. Evidence for support of the...

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Veröffentlicht in:Macromolecular rapid communications. 2000-03, Vol.21 (5), p.213-217
Hauptverfasser: Barbier-Baudry, Denise, Bouazza, Aicha, Brachais, Claire Hélène, Dormond, Alain, Visseaux, Marc
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polymerization
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Zusammenfassung:Lanthanides (samarium and ytterbium) tris and monobenzimidinates are efficient for the polymerization of ε‐caprolactone, the systems remaining active after consumption of the monomer. Nevertheless it is not a living polymerization because the benzimidinates are recovered. Evidence for support of the proposed catalytic cycle was obtained by NMR studies.
ISSN:1022-1336
1521-3927
DOI:10.1002/(SICI)1521-3927(20000301)21:5<213::AID-MARC213>3.0.CO;2-3