Abstract
In our previous work, we have shown that of the two exothermic peaks of DSC curve observed in the radical polymerization of diallyl phthalate (DAP), the second peak is ascribed to the polymerization of unreacted monomer initiated by the DAP prepolymer (PDAP) obtained at the first exothermic temperature range4) . In the present work, the initiation capability of PDAP s obtained under various polymerization conditions was examined in detail. Finally, it was found that the highly active PDAP s are obtained under the following conditions : 1) Polymerization temperature should be low such as at 30°C, 2) monomer concentration be low, 3) polar solvent be used, and 4) polymerization time be shortened, especially in the polymerization at a higher temperature. For example, the PDAP obtained in dioxane at 50°C using 2, 4-dichlorobenzoyl peroxide showed one twentieth polymerizationinitiation-activity of dicumyl peroxide.
