A comparative kinetic study of polymerization by differential scanning calorimetry (DSC) has been carried out by use of calculations based on the Freeman-Carroll, Ellerstein, Achar-Brindley-Sharp, multiple linear regression and Malek methods. With the Sestak-Berggren model of a modified Malek method, we have extracted kinetic information from curves showing a presence of more than one component using criteria based on the minimization of the difference between experimental and calculated thermograms.