Activators generated by electron transfer for atom transfer radical polymerization (AGET ATRP) is a new technique for conducting ATRP developed recently. In this work, an iron(III)-mediated AGET ATRP of styrene in bulk was carried out at 110 A degrees C, using benzyl bromide as an initiator, oxidatively stable iron(III) chloride hexahydrate (FeCl3 center dot 6H(2)O) as a catalyst, triphenyl phosphine as a ligand, and ascorbic acid as a reducing agent. The polymerizations demonstrated the features of "living"/controlled free-radical polymerization, such as the number-average molecular weights increasing linearly with monomer conversion and narrow molecular weight distributions (M (w)/M (n) = 1.14-1.31).