The Role of Amines in the Camphorquinone Photoinitiated Polymerization of Multifunctional Monomer

Abstract

The influence of the camphorquinone (CQ) concentration and thirteen amines on the rate of polymerization of trimethyleneglycol dimethacrylate (TEGDMA) was investigated. As shown, the rate of polymerization of TEGDMA increases with the increasing of the camphorquinone concentration. However, over 6×10−2 M it deviation from the linearlity is observed. Some of the amines decrease the rate of polymerization and some of them increase the rate. The acceleration effect on CQ photoinitiated polymerization of TEGDMA is caused by amines radicals formed by the direct hydrogen atom abstraction from amines by triplet 3CQ*, rather than by the electron–proton transfer reaction.