THE EFFECT OF A MAGNETIC-FIELD ON THE CURING KINETICS FOR A LIQUID-CRYSTALLINE DIEPOXIDE

The effect of magnetic field on the curing kinetics for network polymer based on diglycidyl ester of terephthaloyl-bis(4-hydroxy benzoic acid) in liquid-crystalline phase was studied using calorimetry, NMR, and X-ray diffraction. The magnetic field was shown to inhibit anionic polymerization of diglycidyl ester of terephthaloyl-bis(4-hydroxy benzoic acid). The ordering in the course of spontaneous hardening of the polymer decreases to the ultimate value of 0.5, whereas in anionic polymerization, virtually complete disordering is attained. The ordering of network polymer can be preserved if the polymerization of diglycidyl ester of terephthaloyl-bis(4-hydroxy benzoic acid) is performed according to a programmed temperature history.