Synthesis and characterization of copolymerizable one‐component type II photoinitiator

A copolymerizable one-component Type II photoinitiator (CMEBP), based on 4-hydroxybenzophenone (HBP), epichlorohydrin, morpholine, and acryloyl chloride, was synthesized and its structure was confirmed by 1H-NMR. The properties of CMEBP were investigated with UV spectroscopy and photo-differential scanning calorimetry (photo-DSC). The maximum of UV absorption red-shifted significantly compared to benzophenone (BP). Photopolymerization results of tripropylene glycol diacrylate (TPGDA) indicated that CMEBP had larger maximum rate of polymerization than that of BP/triethanolamine (TEOHA) and HBP/triethylamine (TEA), larger final double bond conversion than that of HBP/TEA, but lower than that of BP/TEOHA. The rate of polymerization, final conversion increased and the induction period shortened with increase in CMEBP concentration. Copyright © 2008 John Wiley & Sons, Ltd.

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