Title :
The electrical conduction in polyimide nanocomposites
Author :
Cao, Yang ; Irwin, Patricia C.
Author_Institution :
GE Global Res. Center, Niskayuna, NY, USA
Abstract :
The electrical properties of polyimide based nanocomposites were fully investigated by isothermal steady-state current, dielectric spectroscopy, and thermally stimulated current measurements. The effect of nano fillers on the dielectric properties was evaluated via the interfacial polarization as well as the electrical conduction mechanism study. The electrical conduction of polyimide nanocomposites is found to be thermally assisted ionic in nature. The shift of the main thermally stimulated current peak to higher temperatures indicates deeper trapping by incorporating nano fillers. As a result, the nanocomposites will at least maintain the electrical breakdown strength because of the reduced electrical conductivity at elevated temperatures.
Keywords :
current density; dielectric polarisation; electrical conductivity; filled polymers; nanocomposites; organic insulating materials; space-charge-limited conduction; thermally stimulated currents; deeper trapping; dielectric properties; dielectric spectroscopy; electrical breakdown strength; electrical conduction; interfacial polarization; isothermal steady-state current; nanofillers; polyimide nanocomposites; thermally stimulated current measurements; Current measurement; Dielectrics; Electrochemical impedance spectroscopy; Isothermal processes; Mechanical factors; Nanocomposites; Optical polarization; Polyimides; Steady-state; Temperature;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2003. Annual Report. Conference on
Print_ISBN :
0-7803-7910-1
DOI :
10.1109/CEIDP.2003.1254808
