Synergistic Effect of 1-Butyl-3-methylimidazolium Hexa?uorophosphate and DMSO in the SARA ATRP at Room Temperature Affording Very Fast Reactions and Polymers with Very Low Dispersity

摘要

An unusual synergistic effect between 1-butyl-3- methylimidazolium hexa?uorophosphate (BMIM-PF6) and dimeth- yl sulfoxide (DMSO) mixtures is reported for the supplemental activator and reducing agent atom transfer radical polymerization (SARA ATRP) of methyl acrylate (MA) using a catalytic system composed by sodium dithionate (Na2S2O4) and CuBr2/Me6TREN (Me6TREN: tris[2-(dimethylamino)ethyl]amine) at room temper- ature. To the best of our knowledge, the use of ionic liquids (IL) has never been reported for the SARA ATRP. The kinetic data obtained for a broad range of target molecular weights revealed very fast polymerization rates, low dispersity values (? < 1.05) and well-de?ned chain-end functionalities.