Kinetics of the single-stage synthesis of polyimides based on unsymmetrical adamantane-containing diamines and dianhydrides of aromatic tetracarboxylic acids

The kinetics of the single stage high-temperature solution synthesis of polyimides derived from unsymmetrical adamantane-containing diamines and dianhydrides of aromatic tetracarboxylic acids by potentiometric titration of the released reaction water with Fisher reagent wsa studied. The effects of the chemical structure of the initial diamines, their basicity, charge distribution on amino groups, and the dissociation energies of NH bonds on the reactivity of the initial diamines are also revealed. It is shown that in some cases reactivity can be predicted by pure calculations.