Effect of Counter Anions on Kinetics and Stereoregularity for the Strong Brønsted Acid-Promoted Group Transfer Polymerization of N,N-Dimethylacrylamide
The strong Brønsted acid‐promoted group transfer polymerization (GTP) of N,N‐dimethylacrylamide (DMAA) using trifluoromethanesulfonimide (Tf2NH) and 2,3,4,5,6‐pentafluorophenyl‐1,1‐bis(trifluoromethanesulfonyl)methane (Tf2CHC6F5) was carried out to quantitatively evaluate the effect of the counter a...
Saved in:
Published in | Macromolecular chemistry and physics Vol. 213; no. 15; pp. 1604 - 1611 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
14.08.2012
WILEY‐VCH Verlag Wiley |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The strong Brønsted acid‐promoted group transfer polymerization (GTP) of N,N‐dimethylacrylamide (DMAA) using trifluoromethanesulfonimide (Tf2NH) and 2,3,4,5,6‐pentafluorophenyl‐1,1‐bis(trifluoromethanesulfonyl)methane (Tf2CHC6F5) was carried out to quantitatively evaluate the effect of the counter anions for the employed acid on the kinetics and the stereoregularity of the polymerization. The equilibrium constant for the monomer activation (K) and the rate constant for the propagation reaction (kp) were determined from the integrated rate equation derived from the presumed polymerization mechanism. Both of the constants for the polymerization using Tf2CHC6F5 were higher than those for Tf2NH. The activation parameters for the syndiotactic propagation were determined from the Fordham plot.
The strong Brønsted acid‐promoted group transfer polymerization of N,N‐dimethylacrylamide is carried out to quantitatively evaluate the effect of the counter anions for the employed acids on the kinetics and the stereoregularity of the polymerization. The equilibrium constant for the monomer activation and the rate constant for the propagation reaction are determined. The activation parameters for the stereospecific propagation are determined from the Fordham plot. |
---|---|
Bibliography: | istex:15AC2A01285B7E1FC493472E1B6E68C2D8C860EF ArticleID:MACP201200146 ark:/67375/WNG-SMLLVSTT-5 |
ISSN: | 1022-1352 1521-3935 |
DOI: | 10.1002/macp.201200146 |