Electrical Transport and Breakdown of Poly-p-Phenylenesulfide

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Abstract
Electrical transport and dielectric breakdown of PPS are studied. Electrical resistivity of PPS film at room temperature is about 1018 Ω·cm and super-linear current-voltage characteristics are observed, which can be explained in terms of either Poole-Frenkel or Schottky effects. Temperature dependence of the conductivity changes remarkably at the glass transition temperature around 90°C. The activation energies of the conductivity are about 0.3 eV and 2.1 eV below and above this temperature, respectively. Dielectric breakdown strength of PPS is relatively insensitive to the temperature compared to the case for PE. Though breakdown strength of PPS is lower than that of PE below room temperature, it becomes higher at temperatures above 100°C.

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