Abstract
Herein we report the photoinduced living radical polymerization of acrylates in a variety of ionic liquids (ILs). 1-Ethyl-3-methylimidazolium ethyl sulfate [emim][EtSO4], 1-heptyl-3-methylimidazolium bromide [C7mim][Br], 1-hexyl-3-methylimidazolium tetrafluoroborate [C6mim][BF4], 1-hexyl-3-methylimidazolium hexafluorophosphate [C6mim][PF6], and 1-octyl-3-methylimidazolium hexafluorophosphate [C8mim][PF6] were employed as solvents for the homopolymerization of a variety of acrylates including methyl acrylate (MA), n-butyl acrylate (n-BA), ethylene glycol methyl ether acrylate (EGA), and poly(ethylene glycol) methyl ether acrylate (PEGA, Mn ≈ 480). Polymerization of MA, EGA, and PEGA in [C6mim][BF4], [C6mim][PF6], and [C8mim][PF6] proceeded in a controlled manner, as evidenced by kinetic studies, narrow molecular weight distributions (Đ ≈ 1.1), and quantitative conversions (>99%) within 30 min. MALDI-ToF-MS and 1H NMR confirmed very high end-group fidelity, which was further exemplified by in situ chain ext...
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