Electrical properties of oil/polymer composite systems with polymer film etched by sputtering in argon environment

The electrical conduction in Al/PPbs/Al with a both-side-sputtered PP (PPbs) film have been investigated using PP (polypropylene) films prepared under various sputtering conditions. The conduction current in PPbs film under some conditions decreases by about two orders of magnitude as compared with conventional PP. The thermally stimulated currents (TSC) of an alkylbenzene PPs composite system with a one-side-sputtered PP (PPs) film reveal that traps on the PP surface are affected by sputtering, and that the PP sputtered under some conditions has more semicrystalline regions near the PP surface than an untreated PP film. The relationships between TSC and tan δ of the alkylbenzene/PPs composite system have also been investigated. These results indicate that surface sputtering not only affects traps under a PP surface but also improves the electrical properties of PP