Primary Research of Electrical Property of Pyrolyzed Polypyrrolone Film under Low Temperature and High Pressure

The temperature dependence of conductivity of polypyrrolone (PMDA-DAB) film pyrolyzed at different pyrolytic temperatures was measured as a function of the applied pressure. The obtained results indicate that the room temperature conductivity increases with the increase of the applied pressure and pyrolytic temperature. The pressure dependence of conductivity can be expressed by improved extended Mott expression. For the carbonization process (Tp800 ℃), the temperature dependence of conductivity can be expressed by the 3-Dimensional Variable Range Hopping (3D-VRH) model. For the graphitization process (Tp800 ℃),a modified 3D-VRH model was fitted.