Electrical conduction and breakdown in heat-resistive polyparabanic acid (PPA) films

The characteristics of electrical conduction and electrical breakdown in heat-resistant PPA films were measured, and the correlation between them is discussed. All samples were aged at 453 K for 12 h, and the current was measured 30 min after voltage application. Electric strength was measured with DC and pulse voltages. Aging of samples for the breakdown measurement was the same as for the conduction measurement. Electrical conduction and electrical breakdown of PPA films show a significant dependence on the chemical structure. The results are explained in terms of thermal breakdown due to Joule heating by hopping conduction.<
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