Abstract
We report on the results of analysis of dielectric properties of poly(diphenylene phthalide) in the frequency range from 25 Hz to 1 MHz at temperatures of 373 and 653 K. It is found that at T 423 K, the value of e″ sharply increases with temperature, attaining a value of about 40 at T = 653 K. We believe that this increase in e″ is due to an increase in the concentration of electrons appearing in poly(diphenylene phthalide) due to thermionic emission. The height of the potential barrier at the aluminum cathode-poly(diphenylene phthalide) interface controlling the ternionic current is estimated as ∼0.7 eV.
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