Reference : Anionic polymerization of pivalolactone initiated by alkali metal alkoxides
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/15643
Anionic polymerization of pivalolactone initiated by alkali metal alkoxides
English
Jedlinski, Zbigniew [Institute of Polymer Chemistry, Polish Academy of Sciences, Zabrze, Poland > > > >]
Kurcok, Piotr [Institute of Polymer Chemistry, Polish Academy of Sciences, Zabrze, Poland > > > >]
Kowalczuk, Marek [Institute of Polymer Chemistry, Polish Academy of Sciences, Zabrze, Poland > > > >]
Matuszowicz, Andrzej [Institute of Polymer Chemistry, Polish Academy of Sciences, Zabrze, Poland > > > >]
Dubois, Philippe [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) > >]
Kricheldorf, Hans R [University of Hamburg, Germany > Institute of Technical and Macromolecular Chemistry > > >]
9-Oct-1995
Macromolecules
Amer Chemical Soc
28
21
7276-7280
Yes (verified by ORBi)
International
0024-9297
Washington
[en] ring-opening polymerization (ROP) ; lactone
[en] Polymerization of pivalolactone (alpha,alpha-dimethyl-beta-propiolactone) initiated with alkali metal alkoxides has been studied. It has been revealed that after addition of an alkoxide anion, from the initiator, onto the carbonyl carbon atom of the monomer the selective cleavage of the acyl-oxygen bond of the monomer leads to the formation of alkoxide propagating species. Thus, it has been demonstrated that, in contrast to alpha-unsubstituted beta-lactones and higher lactones, the anionic polymerization of pivalolactone proceeds through either alkoxide or carboxylate propagation centers, depending on the nature of initiator used, i.e. an alkoxide or a carboxylate, respectively. In the former case, however, cyclic oligomers are also formed which are unusual in the anionic polymerization of other beta-lactones. This indicates that, whatever the lactone ring size (four-, six-, or seven-membered lactones), intramolecular transesterification reactions can take place if alcoholate ions are propagating species.
Center for Education and Research on Macromolecules (CERM)
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; The Polish Academy of Sciences ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy
Researchers
http://hdl.handle.net/2268/15643
10.1021/ma00125a035
http://pubs.acs.org/doi/pdf/10.1021/ma00125a035

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