Title of article :
Electrical properties and stability of polypyrrole containing conducting polymer composites
Author/Authors :
Dalila Ben and Omastovل، نويسنده , , Maria and Kosina، نويسنده , , Stanislav and Pionteck، نويسنده , , Jürgen and Janke، نويسنده , , Andreas and Pavlinec، نويسنده , , Juraj، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 1996
Abstract :
Conducting polymer composites of polyethylene and polypyrrole (PE/PPy), polypropylene and polypyrrole (PP/PPy), and poly (methyl methacrylate) and polypyrrole (PMMA/PPy) were prepared by means of a chemical modification method, resulting in a network-like structure of polypyrrole embedded in the insulating polymer matrix. The content of polypyrrole determined by elemental analysis varied from 0.25 to 17 wt.%. Electrical conductivity of compression-moulded samples depends on the concentration of polypyrrole and reached values from 1 × 10−11 to 1 S/cm. The morphology of the composites was investigated by low-voltage scanning electron microscopy (LVSEM). Potential contrast measurements as a function of the acceleration voltage were used to prove the perfection of the PPy network structure. The electrical transport mechanism in PP/PPy composite was studied. The data of the temperature dependence of conductivity were fitted following the function for a charge-energy-limited tunnelling (CELT) model. There is only a small drop in conductivity caused by annealing of PP/ PPy composites in air at temperatures up to 80 °C. A stabilizing effect of PPy on thermal stability of polypropylene is shown by thermogravimetric analysis. The antistatic properties of PE/PPy and PMMA/PPy composites were demonstrated.
Keywords :
Composites , Polypyrrole , blends , Polyethylene , poly(methyl methacrylate) , Electrical properties , stability , Polypropylene
Journal title :
Synthetic Metals
Journal title :
Synthetic Metals