Abstract
The effect of 3% ferric chloride-10% citric acid or 3% cupric chloride-10% citric acid aqueous solutions which have been found to be effective as pre-treatment solutions for the adhesion between resins and teeth on the radical polymerization of methyl methacrylate(MMA)was investigated.Solution polymerization in p-dioxane and bulk polymerization, keeping the pre-treatment solutions dispersed mechanically, were carried out and the rates of polymerization and the molecular weight distributions were determined.In the bulk polymerization, the rate of polymerization was diminished by the addition of the pre-treatment solutions, and, however, the weight-average molecular weight of polymer went up to about 5×105 in the final curing stage.These results suggest that the effect of the pre-treatment solutions on the polymerization was gradually lowered as the reaction proceeded, although the polymerization was deeply affected by the pre-treatment solutions in the early stage.
