Controlled ring-opening polymerization of epsilon-caprolactone promoted by "in situ" formed yttrium alkoxides

Martin, Eric; Dubois, Philippe; Jérôme, Robert

doi:10.1021/ma991045r

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Article (Scientific journals)

Controlled ring-opening polymerization of epsilon-caprolactone promoted by "in situ" formed yttrium alkoxides

Martin, Eric; Dubois, Philippe; Jérôme, Robert

2000 • In Macromolecules, 33 (5), p. 1530-1535

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https://hdl.handle.net/2268/4172

DOI
10.1021/ma991045r

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Keywords :

ring-opening polymerization (ROP); lactone

Abstract :

[en] The ring-opening polymerization of ε-caprolactone has been initiated by [tris(hexamethyldisilyl)amide]yttrium in the presence of an excess of 2-propanol. This initiating system is very active even at high alcohol-to-Y molar ratio. Polymers with controlled molecular parameters (Mn, end groups) and low dispersity are formed as result of fast alkoxide/alcohol exchange. At molar excess of 2-propanol higher than 100, this exchange is no longer quantitative. The in situ formed active species involved in this new initiating system are different from those ones present in the commercial yttrium oxo-isopropoxide Y5(μ-O)(OiPr)13 cluster. Evidence is provided by 1H NMR spectroscopy.

Research Center/Unit :

Center for Education and Research on Macromolecules (CERM)

Disciplines :

Materials science & engineering
Chemistry

Author, co-author :

Martin, Eric; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)

Dubois, Philippe ; University of Mons-Hainaut (UMH) > Laboratory of Polymeric and Composite Materials (SMPC)

Jérôme, Robert ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)

Language :

English

Title :

Controlled ring-opening polymerization of epsilon-caprolactone promoted by "in situ" formed yttrium alkoxides

Publication date :

07 March 2000

Journal title :

Macromolecules

ISSN :

0024-9297

eISSN :

1520-5835

Publisher :

Amer Chemical Soc, Washington, United States - Washington

Volume :

Issue :

Pages :

1530-1535

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://pubs.acs.org/doi/pdf/10.1021/ma991045r

Funders :

BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique

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since 14 January 2009

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