Synergistic Effect of 1‑Butyl-3-methylimidazolium
Hexafluorophosphate and DMSO in the SARA ATRP at Room Temperature
Affording Very Fast Reactions and Polymers with Very Low Dispersity
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Abstract
An
unusual synergistic effect between 1-butyl-3-methylimidazolium hexafluorophosphate
(BMIM-PF<sub>6</sub>) and dimethyl 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 (Na<sub>2</sub>S<sub>2</sub>O<sub>4</sub>) and CuBr<sub>2</sub>/Me<sub>6</sub>TREN (Me<sub>6</sub>TREN:
tris[2-(dimethylamino)ethyl]amine) at room temperature. 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 (<i>Đ</i> < 1.05) and well-defined
chain-end functionalities
