Improvement of the Electret Properties of Polystyrene with Introduction of Titanium Dioxide

Resumo

The electret properties of polystyrene composites with titanium dioxide were studied. The optimal parameters were defined for manufacturing corona electrets based on polystyrene. The introduction of 2–10 vol % titanium dioxide into polystyrene resulted in better electret performance owing to an increased portion of polymer macromolecules with a reduced mobility, the appearance of interphase polarization, and the formation of high-energy traps at the polymer–filler interphase boundary. It was shown that the thermal stability of the electret properties significantly increased for the polystyrene filled with titanium dioxide.