Primary Research of Electrical Property of Pyrolyzed Polypyrrolone Film under Low Temperature and High Pressure
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摘要: 通过对裂解聚吡咙（PMDA-DAB）薄膜导电性环境温度、裂解温度及压力关系的研究表明：其室温导电率随所加压力与裂解温度的升高而增加。电导与温度的依赖行为有赖于裂解温度Tp及所加的压力在Tp800 ℃时，碳化过程产物能符合三维变程跃迁模型；而在Tp800 ℃时，石墨化过程产物则比较符合修正的三维变程跃迁模型。最大的导电率是在裂解温度为1 200 ℃的裂解产物上在1.05 GPa压力下获得的，数值约1 000 S/cm，电导与压力的关系能较好地符合所改进的扩展莫特关系。Abstract: 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.
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Key words:
- pyrolytic temperature /
- polypyrrolone /
- hopping energy /
- Mott model
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