RELAXATION PROPERTIES OF POLYBISMALEIMIDAMINE IN THE COURSE OF HEAT TREATMENT.

The purpose of this work was to study these parti-characteristics in order to obtain information on the changes occurring in the chemical and physical structure of PBMIA (polybismaleimidamine) in the course of HT Heat Treatment and to determine the optimal HT Heat Treatment conditions. It is shown that the multiplet character of alpha relaxation, due to the fact that different levels of supermolecular organization are possible in a network polymer, has been detected for the first time in PBMIA. It was found that HT of PBMIA may product significant changes both in the physical and in the chemical structure of the polymer. This results in considerable changes of various physical properties of the material. The optimal HT regime for completion of structural changes and accordingly for stabilization of the polymer properties is heating at 250 degree for 6-7 h.