Pyridylphosphine ligand for iron-based atom transfer radical polymerization

POLY 179

Thanh Thi Le Nguyen, lethanhpo@yahoo.com1, Zhigang Xue, zgxue2001@hotmail.com1, Hoang Dan Que Dang, danque1861@yahoo.com1, Seok Kyun Noh, sknoh@ynu.ac.kr1, and Won Seok Lyoo, wslyoo@yu.ac.kr2. (1) School of Display and Chemical Engineering, Yeungnam University, 214-1 Dae-dong, Gyeongsan, Gyeongbuk, 712-749, South Korea, (2) School of Textiles, Yeungnam University, 214-1 Dae-dong, Gyeongsan, Gyeongbuk, 712-749, South Korea
Two pyridylphosphine ligands, 2-(diphenylphosphino)pyridine (DPPP) and 2-[(diphenylphosphino)methyl]pyridine (DPPMP), were employed as novel complexing ligands in iron-mediated atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) with various initiators. In studies of their ATRP behaviour, FeBr2/DPPP catalytic system was more efficient than other complexes studied on this paper. Most of these systems were exhibited a well-defined linear relationship in the number average molecular weights to conversion and relatively low molecular weight distributions (Mw/Mn = 1.15-1.3) throughout the reactions. The experimental molecular weights were matched well with the calculated values with DPPP ligand. The polymerization rate of MMA attained a maximum at 2:1 ratio of ligand to metal in p-xylene at 80°C. The polymerization was faster in polar solvents, as compared to p-xylene.
 

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