Photopolymerization kinetics of ionic liquid monomers derived from the neutralization reaction between trialkylamines and acid-containing (meth)acrylates

Polymerizable ionic liquids were synthesized from the neutralization reaction between trialkylamines (tributylamine, trihexylamine, trioctylamine, 2-(dimethylamino)ethyl acrylate, and 2-(dimethylamino)ethyl methacrylate) and acid-containing (Meth)acrylates to study the kinetics of their photopolymerization. The ionic liquids formed from acrylic acid and methacrylic acid with trialkylamines showed low or moderate increases in rate compared to their monofunctional analogues. The ionic liquids formed from (meth)acrylic acid and a tertiary amine with a pendant acrylate exhibited rates typical of traditional di(meth)acrylates, although the (Meth)acrylates were not covalently attached to the same molecule. All of the phosphate-based ionic liquids exhibited very rapid polymerization rates and strong dependence on the initial viscosity. (c) 2007 Wiley Periodicals, Inc.