Cp2TiCl-Catalyzed styrene living radical polymerization initiated from 4-methoxybenzenesulfonyl chloride

POLY 128

Alexandru D. Asandei, asandei@ims.uconn.edu and Gobinda Saha, gobinda@ims.uconn.edu. Institute of Materials Science and Department of Chemistry, University of Connecticut, 97 North Eagleville Road, Storrs, CT 06269
The Cp2TiCl-catalyzed styrene living radical polymerization occurs readily from activated halides such as 4-methoxybenzenesulfonyl chloride. The investigation of the effect of Cp2TiCl/Zn ratios (1/0.5-1/4) and of temperature (60-120 °C) reveals that in accordance with the proposed in situ regeneration of Cp2TiCl, a minimum Cp2TiCl2/Zn =1/1 ratio is necessary for polymerization control by reversible C-Ti bond formation. While narrower polydispersities are observed at 60-90 °C, potential side reactions such as the Ti reduction of the sulfoxide and the interaction of the halide with Zn limit the PDI values to about 1.25-1.3.
 

General Papers: Functional Materials
6:00 PM-8:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Polymer Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007