Article (Scientific journals)
A possible route to the controlled synthesis of polymethyloxirane oligomers using bimetallic μ-oxoalkoxides
Taquet, Anne; Jérôme, Robert; Teyssié, Philippe et al.
1995In Journal of Polymer Science. Part A, Polymer Chemistry, 33 (7), p. 1169-1176
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Abstract :
[en] Soluble -oxo-bimetallic trinuclear alkoxides are known to be very effective catalysts for the ring-opening polymerization of oxiranes. In the particular case of methyloxirane, oligomers are formed in addition to high molecular weight polyethers. An alkoxide-alcohol exchange reaction has proved to be an efficient way to form oligomers preferentially, when the monomer-alcohol molar ratio is small. Upon increasing this ratio, formation of high MW chains occurs increasingly. The use of Ti instead of Al in Al, Zn -oxo-n-butoxide in the presence for phenoxyethanol as a co-initiator inhibits formation of exceedingly long polyether chains and the chain length is basically controlled by the monomer to all potential initiating species molar ratio until MW of ca. 6000. Substitution of phenoxyethanol by polypropylene glycol has led to oligomers of a monomodal MW distribution and a MW of 13,000. This study has highlighted that conditions unfavorable to coordination of the polyether chains onto the catalyst improve the control of the oligomer formation. © 1995 John Wiley
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry
Author, co-author :
Taquet, Anne;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Jérôme, Robert ;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Teyssié, Philippe ;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Masy, Jean Pierre;  University of Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Goethals, E.;  New Carbochim SA
Language :
English
Title :
A possible route to the controlled synthesis of polymethyloxirane oligomers using bimetallic μ-oxoalkoxides
Publication date :
1995
Journal title :
Journal of Polymer Science. Part A, Polymer Chemistry
ISSN :
0887-624X
eISSN :
1099-0518
Publisher :
John Wiley & Sons, Hoboken, United States - New Jersey
Volume :
33
Issue :
7
Pages :
1169-1176
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
Région wallonne [BE]
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