Two different calorimetric techniques have been used to determine thermokinetic parameters and to asses the thermal stability of bulk methyl methacrylate (MMA) polymerization. The results obtained with both methods are in agreement with those reported in the literature. New correlations based on experimental results have been proposed to describe the influence of diffusion phenomena on the dynamics of the process. A mathematical model based on the experimental results has been developed in order to execute an analysis of the dynamics of the process.