Propagation rate coefficients, k p , of methyl methacrylate (MMA) and glycidyl methacrylate (GMA) homopolymerizations were measured at ambient pressure in four ionic liquids (ILs): 1‐ethyl‐3‐methylimidazolium ([emim]) ethyl sulfate and [emim] hexyl sulfate as well as butyl‐3‐methylimidazolium ([bmim]) hexafluorophosphate and [bmim] tetrafluoroborate via the pulsed‐laser polymerization size‐exclusion chromatography technique. In passing from bulk polymerization at 40 °C polymerization in IL solution containing 20 vol % monomer, k p is enhanced by up to a factor of 4 with MMA and by a factor of 2 with GMA. This enhancement of k p primarily results from a lowering of activation energy upon partial replacement of monomer by ionic liquid species.
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Woecht et al. (2007) studied this question.
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