PROCESSING THE EXPERIMENTAL THERMOGRAVIMETRY DATA BASED ON INTEGRAL ASSESSMENT OF REACTION RATE CHANGE AS TEMPERATURE INCREASES
The article discusses issues related to the processing of the results of thermogravimetric experiments on the heating of needles. Due to the fact that during heating of the sample takes place a series of reactions each of which simulation is too difficult, so it is advisable to model all processes as one or two stages. In this work stages are considered as consecutive, i.e. the product of the first stage is the reactant of the second one. Thermokinetic constants of these steps are calculating on the basis of the inverse problem solution, while the share of nonreacting residue at each stage, and the temperature segment boundaries are determined by expert analysis. Proposed algorithm in the article is based on analysis of changes in substance consumption rate with increasing temperature. For correct operation the algorithm requires that at a predetermined temperature interval key reaction should dominate thermokinetic parameters of which to be found.