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Keywords:

  • controlled/living polymerization;
  • ionic liquids;
  • kinetics (polym.);
  • nitroxides;
  • radical polymerization

Abstract

Thumbnail image of graphical abstract

equation image (filled symbols) and equation image (open symbols) vs. conversion for the MA polymerization in the presence of [4-oxo-TEMPO]/[AIBN] (2.8:1) in 50% v/v anisole with 0.03 M AIBN (squares) and 50% v/v [hmim][PF6] with 0.03 M AIBN (circles), and 0.06 M AIBN (triangles).

Summary: The controlled/living radical polymerizations of methyl acrylate in 50% v/v of an ionic liquid initiated by the alkoxyamine generated in situ from 4-oxo-2,2,6,6-tetramethyl-1-piperidinyl-N-oxyl (4-oxo-TEMPO) and 2,2′-azoisobutyronitrile (AIBN) at 140–155 °C are reported. The number-average molecular weights increased linearly with conversion, and polydispersity indices are approximately 1.4 in the best case. The rates of polymerization were greater than in anisole, and similar to the rate of spontaneous polymerization in the ionic liquid.