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Substituted Benzophenones as Photoinitiators

Substituted benzophenone photoinitiators were synthesized and characterized by spectroscopy methods. Their absorption spectra and kinetics of the polymerization were compared to benzophenone itself. The kinetics of the photopolymerization of 2-ethyl-2-(hydroxymethyl)-1,3-propanediol triacrylate (TMPTA) was studied by measuring the polymerization heat evolution of sample, irradiated with a laser. The influence of photoinitiator concentration and light intensity on the polymerization was also studied.