A new method was developed for evaluation of the results of thermal analysis of phenol stabilizers used for the thermal stabilization
of light-coloured polymers. The integral observed decomposition temperature obtained by using Doyle's method from the thermogravimetric
curves was used as a basis of approach. For this purpose, the computational program TERMOGRAF for PC/AT is suggested. It is
considered that the integral observed decomposition temperature is a more reliable and reproducible characteristic of thermal
stability than the approach based on the temperature of beginning of decomposition.