The kinetics of radical polymerization of methyl methacrylate were investigated in a dioxane solution with cyclohexanone as initiator. It was found that the overall rate of reaction initiated with cyclohexanone (R//p) is proportional to the concentration of monomer and to the square root of the concentration of the initiator. The effect of temperature on the R//p in the temperature range of 65-95 degree C was discussed. The Arrhenius activation energy E//a estimated for the temperature range of 65-75 degree C was 137 kJ mol** minus **1.