High-temperature conductivity of PI films

Abstract

In polyimide films, there occur breaks in the reciprocal-temperature dependence of the log-electrical conductivities. It indicates that the multiple transitions and relaxations of the polyimide films are reflected in the above mentioned relationship. This presents us the possibility to determine the rule of variations of the electrical conductivities of the polymer with temperatures and is of interest to all working in the insulation field, especially in the semi-rigid chain polymer field.