Abstract
The aim of this study is to improve the polymerization degree of visible light-cured resin. After preparing some kinds of trial visible light-cured resin by changing the amount of catalysts (a number of times), each set product was examined with regard to water sorption and solubility when set products were immersed in water and MeOH sorption, THF sorption and constituents of elution when set products were immersed in organic solvents. No clear relation between the varieties or amount of catalysts and water sorption or solubility was detected for set products immersed in water for a short period of sixty days or so. However, when MeOH was used as a solvent, there was an undeniable relation between the amount of catalysts and solubility, despite of the briefness of the immersion time. Finally the solubility of a trial visible light-cured resin that used the cyclophosphazene monomer 4PN-(TF)1-(EMA)7 was less than that of a resin which used commercially available Tri-EDMA. The amount of solubilized unreacted monomer was relatively small. In this case, the eluted amount of DMAB was most outstanding of all the catalysts. For the decrease of solubility, an effective method was found to be to increase the amount of photoinitiators, CQ and DB, to be mixed, while decreasing the amount of an auxiliary catalyst, DMAB.
