Macromolecular Rapid Communications, Vol.30, No.7, 543-547, 2009
A Highly Active Iron-Based Catalyst System for the AGET ATRP of Styrene
The atom transfer radical polymerization of styrene using activators generated by electron transfer (AGET ATRP) has been carried out in bulk in a limited amount of air at 110 degrees C, using 1,3,5-(2'-bromo-2'-methylpropionato)benzene (BMPB) as an initiator and FeCl3 center dot 6H(2)O/tris(3,6-dioxaheptyl) amine (TDA-1)/ascorbic acid (VC) as a novel Fe-III-mediated catalyst system. The results of the polymerizations demonstrate the features of `living'/controlled free-radical polymerization, such as the number-average molecular weights being close to their corresponding theoretical values and increasing linearly with monomer conversion, and narrow molecular weight distributions ((M) over bar (w)/(M) over bar (n) = 1.18-1.26). The end functionality of the obtained polymers was confirmed by H-1 and C-13 NMR spectra as well as a chain-extension reaction.
Keywords:atom transfer radical polymerization (ATRP);AGET ATRP;iron catalyst;living/controlled radical polymerization;polystyrene;tris(3,6-dioxaheptyl) amine (TDA-1) ligand