Visible light photopolymerization induced by triazine derivative
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2-(3,4-Methylenedioxyphenyl)-4,6-bis-(trichloromethyl)-1,3,5-triazine as a visible light photo-initiator was used for creation of dental composite. UV-Vis absorption spectroscopy was applied to investigate photochemical behavior of initiator during the photochemical process. For the copolymerization of 2,2-bis-[4-(2-hydroxy-3-methacryloxypropoxy) phenyl] propane/triethylene glycol dimethacrylate (75/25 wt %) in the presence of photoinitiator the optimum cure rate was found; the cure rate increased with the increase in photoinitiator concentration. Compared to the commonly used tertiary amines, the camphorquinone/2-(3,4-methdioxyphenyl)-4,6-bis-(trichloromethyl)-1,3,5-triazine system reacted more quickly and the final conversion were higher than that of traditional camphorquinone/ethyl 4-N,N-dimethyl aminobenzoate system.
KeywordsPolymer Science Series Triazine Photopolymerization Final Conversion Glycol Dimethacrylate
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