Kinetic method by using calorimetry to mechanism of epoxy-amine cure reaction - III. Determination of the thermokinetic parameters

In this paper, it is clearly demonstrated that the dependence of the rate of evolving heat on time is completely described by using Mangelsdorf's method in terms of three processes with excellent precision. The first two exothermic processes take into account the fact, that the reaction occurs by two competitive mechanisms: one is a non-catalytic mechanism and the other is catalyzed by OH-groups formed during the reaction. The third one refers to the endothermic process where the reaction is accompanied by diffusion of the reaction products. The distinctive feature of this diffusion process is that it is the coupling of the reaction kinetics and rearrangement of the chains built to the rigid supramolecular structure. This simple model allows accurate simulation of kinetic behaviour.