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 photopolymerization of a diacrylate using a morpholino ketone as photoinitiator. The curing reaction was induced by monochromatic UV radiation with a wavelength of 313 nm. The influence of photoinitiator concentration [PI], light intensity I₀, and temperature on the polymerization rate R_p and the double bond conversion was investigated. The dependence of R_p on [PI] and I₀, 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.