| 초록 |
Two pyridylphosphine ligands, 2-(diphenylphosphino)pyridine (DPPP) and 2-[(diphenylphosphino)methyl]pyridine (DPPMP), were investigated as complexing ligands in the iron-mediated atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) and styrene with various initiators and solvents. In studies of their ATRP behavior, the FeBr2/pyridylphosphines catalytic systems were efficient ATRP catalysts for the MMA polymerization. Most of these systems were well controlled with a linear increase in the number average molecular weights (Mn) vs. conversion and relatively low molecular weight distribution being observed throughout the reactions, and the measured molecular weights matched the predicted values. The 2-bromopropionitrile initiated ATRP of MMA was able to be controlled at 80℃. 2-(diphenylphosphino)pyridine) was employed in the iron(III)-catalyzed atom transfer radical polymerization of MMA in the absence of any radical initiator or reducing agent. |
