Short-Term Dielectric Performance Assessment of BOPP Capacitor Films: A Baseline Study

Abstract

This paper examines the morphology and short-term dielectric performance of commercial capacitor BOPP films, with the purpose of serving as an industrial reference in European project GRIDABLE in which next-generation PP-silica nanocomposite materials are developed for DC capacitor and cable applications. Results from dielectric spectroscopy, thermally stimulated depolarization current (TSDC) and DC conductivity measurements are reported, providing insight into the dielectric loss behavior and charge trapping/transport properties of the studied films. Comprehensive short-term dielectric breakdown strength analysis using small- and large-area approaches indicates high dielectric breakdown performance, even at an elevated temperature of 100 °C.