Synthesis and photopolymerization kinetics of oxime ester photoinitiators

摘要

Oxime Ester (OXE) Photoinitiators were synthesized and characterized by HPLC, FTIR, UV-Vis spectra, and 1H-NMR. The UV-Vis spectra of these photoinitiators were similar to Benzophenone (BP) but showed large red-shifted maximum absorption. OXE were not only soluble in many solvents and (meth) acrylate monomers but also could be dispersed easily in propylene glycol monomethyl ether acetate (PGMEA). The kinetics of polymerization of monomer using OXE as photoinitiator was studied by Real-time infrared (RTIR) spectra. It showed that OXE were an efficient photoinitiator. The concentration of OXE, functionality of monomer, and light intensity had effect on the photopolymerization kinetics.