Radiation polymerization of compositions based on heptyl methacrylate. Plasticizer effect

Radiation polymerization (60Co, 5kGy/h) of heptyl methacrylate in the presence of chlorinated PE and chlorinated paraffin being a plasticizer of the formed polymer has been studied. Autoacceleration of polymerization is related with sharply increased viscosity of the system as a result of accumulation of the soluble polymer. Introducing of chlorinated paraffin into the radiation-cured compositions results in cessation of autoacceleration and cross-linking and to finish the curing process the higher irradiation doses are necessary. MM of the introduced polymer does not affect essentially the value of the propagation constant, but decreases the termination constant