Modelling polarization and conduction processes in poly(ethylene naphthalate)

Challenges in the field of solid organic insulators are linked to the development of more compact, reliable and eco-friendly systems where these materials are employed as dielectrics. One way to increase the reliability of such systems is to understand and model the behavior of these materials under thermo-electrical stress, in order to prevent any failure. Fluid charge transport models have been developed to predict the charge accumulation in such materials when submitted to an external stress, mostly electrical. However, these kind of models are not enough to predict the global behavior of the material, as most of these dielectrics are polar materials, subjected to a non-negligible dipolar response. This paper shows the first simulation results produced using a global charge transport model including polarization, and compares simulated to experimental current measurements. For moderate fields and temperatures, the model is able to reproduce the experimental results, qualitatively and quantitatively.