title: Ultraproductive, zinc-mediated, immortal ring-opening polymerization of trimethylene carbonate.
authors.affiliation: Catalysis and Organometallics, UMR 6226 CNRS - Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex (France), Fax: (+33) 2-2323-6939.
authors.forename: Marion
authors.initials: M
authors.lastname: Helou
authors.affiliation: Total Petrochemicals Research, Zone Industrielle C, 7181 Feluy (Belgium).
authors.forename: Olivier
authors.initials: O
authors.lastname: Miserque
authors.affiliation: Total Petrochemicals Research, Zone Industrielle C, 7181 Feluy (Belgium).
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Brusson
authors.affiliation: Catalysis and Organometallics, UMR 6226 CNRS - Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex (France), Fax: (+33) 2-2323-6939.
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Carpentier
authors.affiliation: Catalysis and Organometallics, UMR 6226 CNRS - Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex (France), Fax: (+33) 2-2323-6939.
authors.forename: Sophie M
authors.initials: SM
authors.lastname: Guillaume
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references.citation: The moderate broadness of molar mass distribution values is typical for bulk polymerizations and reflects the occurrence of side processes (transfer and/or transesterification reactions) all along the propagation step.[2c, 4a]
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references.citation: Evaluation of the performances of the ZnEt2/BnOH analogous system revealed a similar activity and a control of the polymer molar features as good (M̄n theory=1950; M̄n SEC=2600, M̄w/M̄n=1.15; TOF=360) as those obtained with [Zn(bdi){N(SiMe3)2}]/BnOH (Table, 1, entry 9) under similar experimental conditions. Yet commercially available ZnEt2 displayed a lower efficiency with a similar conversion (90 %) being obtained within 2 h compared to 20 min for the β-diketiminate amide derivative. However, this ZnEt2/BnOH system was no longer active at higher [TMC]0/[BnOH]0 ratios.