Browse by author
Lookup NU author(s): Dr Ulrich Baisch
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
Complexes Co[OC(Ph)CHC(Me)NAr]2 [Ar=Ph, 1; o,o-C6H3Me2 (Xyl), 2; p-C6H4CF3, 3] are tested in the polymerization of vinyl acetate (VAc) initiated by V-70 (0.8 equiv) at 30 °C. Polymerization occurs without any notable induction time yielding PVAc with relatively low polydispersity, but with higher than expected Mn values, which indicates inefficient trapping processes. The apparent polymerization rate constant varies in the order 2>1>3. Controlled polymer growth is also observed when the polymerization is conducted in the presence of a much higher V-70/1 ratio, demonstrating that this system can also function as a transfer agent in a degenerative transfer process. Competition between chain growth and catalyzed chain transfer (CCT) is also observed, the latter prevailing at higher temperatures. Comparison of these results with previous reports on bis(-diketonato) complexes allows a separate assessment of ligand electronic and steric effects in the ability to control polymerization.
Author(s): Kumar KSS, Li Y, Gnanou Y, Baisch U, Champouret Y, Poli R, Robson KCD, McNeil WS
Publication type: Article
Publication status: Published
Journal: Chemistry: An Asian Journal
Year: 2009
Volume: 4
Issue: 8
Pages: 1257-1265
ISSN (print): 1861-4728
ISSN (electronic): 1861-471X
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
URL: http://dx.doi.org/10.1002/asia.200900084
DOI: 10.1002/asia.200900084
Altmetrics provided by Altmetric
