Sesamin as a co-initiator for UV photopolymerization

Sesamin, a nature compound from sesame seed, which contains two cyclic acetal structures, was used as a co-initiator for UV polymerization initiator system, and 1,6-Hexanedioldiacrylate was used as the photopolymerization monomer. Photopolymerization kinetics was recorded by real-time infrared spectroscopy. For BP/Sesamin initiator system, the double bond conversion increased with the increase of Sesamin concentration and light intensity. Combination of p-chlorobenzophenone and Sesamin had the highest initiating reactivity. The polymerization rate and final double bond conversion of acrylate monomer were higher than that of methacrylate monomer.