Kramarenko V. Kinetics of formation and relaxations in heterocyclic polymer networks

A kinetics model of diisocyanate trimerization was proposed on the basis of isoconversional approach for analysis of differential scanning calorimetry data. This model could be used as a universal method for solving of kinetics problems of bulk cure as well as for analysis of the factors influencing on trimerization rate of epoxy-isocyanate compositions. The existence of pair correlations between arrhenius kinetic parameters is observed independently from accelerating conditions of this process. The regularities of relaxation behavior were revealed on the basis of combined investigations of relaxation properties of model heterocyclic polymer networks with different concentration of cross-links. The increase of network density is accompanied the reinforcement of both small-scale interactions and the level of cooperativity of glass-forming process.