Isothermal Photo Differential Scanning Calorimetry - Crosslinking polymerization of multifunctional monomers in presence of visible light photoinitiators

The effect of photoinitating (camphorquinone/amines) system concentration and sample thickness on the photopolymerization of triethyleneglycol dimethacrylate/2-hydroxypropyl methacrylate has been investigated. The rate of photopolymerization reaches a maximum and then decreases as the concentration of photoinitiating system increases. This effect has been intepreted as inner filter effect.