Kinetic investigations on the UV-induced photopolymerization of a diacrylate by time-resolved FTIR spectroscopy: the influence of photoinitiator concentration, light intensity and temperature

Time-resolved FTIR-ATR spectroscopy was used to study the kinetics of the p hotopolymerization of a diacrylate using a morpholino ketone as photoinitia tor. The curing reaction was induced by monochromatic UV radiation with a w avelength of 313 nm. The influence of photoinitiator concentration [PI], li ght intensity I-o, and temperature on the polymerization rate R-p and the d ouble bond conversion was investigated. The dependence of R-p on [PI] and I -o, respectively, was found to fit with theoretical predictions very well. In contrast, an increase of the temperature was found to have no effect on R-p. (C) 1999 Elsevier Science Ltd. All rights reserved.