POLY 123 |
| Detailed investigation on the atom transfer radical polymerization (ATRP) in the presence of Cu0 was carried to clarify the mechanism and kinetics of this process. Polymerization of MA was successfully reached to high conversion within a very short time in both DMSO and acetonitrile (MeCN). Disproportionation study of CuIBr/tris(2-dimethylaminoethyl)amine suggested that disproportionation is limited in DMSO and negligible in MeCN. Activation constant for Cu0 and comproportionation constant were obtained by fitting the model reaction data. Contribution of activation with Cu0 is below 1% in most cases. By implementing chain length and conversion dependent termination coefficient, simulations demonstrated that this process obeys activators re-generated by electron transfer (ARGET) ATRP rather than single-electron-transfer living radical polymerization (SET-LRP) process mechanism |
|
General Papers: Functional Materials
6:00 PM-8:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster
Sci-Mix
Division of Polymer Chemistry |