PHOTOINITIATED VINYL POLYMERIZATION BY SAFRANINE T TRIETHANOLAMINE INAQUEOUS-SOLUTION/

The photolysis of safranine T in the presence of triethanolamine has b een used as a source of free radicals in the polymerization of 2-hydro xyethyl methacrylate in aqueous solution. The polymerization rate was measured at several amine and dye concentrations. Flash photolysis stu dies of safranine in basic aqueous solutions indicate that the photoin itiation proceeds by the amine radicals formed in the interaction of t he unprotonated form of the dye triplet with the hydroxyl amine. Prima ry radical termination does not play a significant role. Copyright (C) 1996 Published by Elsevier Science Ltd.