Photopolymerizable systems containing organophosphorus compounds as photoinitiators

摘要

p-Methoxybenzoyidialkylphosphonates, terephtaloylbis(dialkylphosphonates), (alkyl=methyl, ethyl), p-methoxybenzoyl-diphenylphosphine oxide and terephtaloylbis(diphenylphosphine oxide) were synthesized by Michaelis-Arbuzov reaction. These compounds were used as photoinitiators for radical polymerization of acrylic monomer 1,6-hexandiol diacrylate. The photoinitiating activity was determined by differential photocalorimetry (DPC), in isothermal conditions, using 1,6-hexandiol diacrylate as monomer, in the absence of amines and in the presence of amines as synergist additive. The influence of amine on photoreactivity parameters was studied. The kinetic study of polymerization of 1,6-hexandiol diacrylate sensitized by these radical photoinitiators have been studied by DPC. These compounds performed good photoinitiating activity in comparison with commercial product Lucirin TPO (2,4,6-trimethylbenzoyidiphenylphosphine oxide).