Depth characterization by confocal Raman microscopy of oxygen inhibition in free radical photopolymerization of acrylates: Contribution of the thiol chemistry

摘要

Light emitting diodes (LEDs) can provide a safer, visible light source for photopolymerisation processes. Other advantages of these light sources are their negligible heat emissions, efficient conversion of energy to light, long lifetimes, no warm up period and relatively low cost. However, photopolymers cured using LEDs often exhibit lower levels of cure and form tacky surfaces.