Synthesis and polymerization of new pyrrolidone-containing methacrylate monomers

George M. Iskander, Lucy E. Baker, Dianne E. Wiley, Thomas P. Davis

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Seven new pyrrolidone-containing methacrylate monomers have been synthesised and characterised via n.m.r. and FTi.r. These monomers were polymerized using azobisisobutyronitrile as a thermal initiator at 60°C. Basic solubility tests were performed at room temperature and two of the polymers were found to be water soluble, namely poly(2-pyrrolidone-1-isopropenyl ketone) (PPIK) and poly(2-ethyl-2-pyrrolidone methacrylate) (PEPMA). The lower critical solution (LCST) behaviour of these two polymers was investigated and found to be in a temperature range similar to that reported for poly(N-isopropylacrylamide) (PNIPAAM) with onset LCST values (on heating) between 29 and 34°C. The effect was found to be reversible on cooling the solution. A comparison was made with PNIPAAM which seemed to indicate a slightly broader LCST transition for the two new polymers, however no conclusions could be firmly established on this as the molecular weights of the polymers were not measured.

Original languageEnglish
Pages (from-to)4165-4169
Number of pages5
Issue number17
Publication statusPublished - 1 Jan 1998
Externally publishedYes


  • Lower critical solution temperature
  • Pyrrolidone
  • Thermotropic

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