Synthesis, Electrical Properties and Stability of Polypyrrole-Containing Conducting Polymer Composites

✍ Scribed by Omastová, Mária; Pavlinec, Juraj; Pionteck, Jürgen; Simon, Frank

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 466 KB
• Volume: 43
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/(sici)1097-0126(199706)43:2<109::aid-pi707>3.0.co;2-t

✦ Synopsis

Conducting polymer composites of polyethylene and polypyrrole (PE/ PPy), polypropylene and polypyrrole (PP/PPy) and poly(methyl methacrylate) and polypyrrole (PPMA/PPy) were prepared by means of a chemical modiÐcation 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 0É25 to 17 wt%. Electrical conductivity of compressionmoulded samples depended on the concentration of polypyrrole and reached values from 1 ] 10~11 to 1 S cm~1. The morphology of the composites and blends was studied by low-voltage scanning electron microscopy. The stability of PP/PPy composites was investigated by thermogravimetric analysis and by conductivity measurements during heatingÈcooling cycles. There was only a small drop in conductivity caused by the annealing of PP/PPy composites in air at temperatures up to 80¡C. The results of thermogravimetric analysis showed a stabilizing e †ect of PPy on PMMA/PPy composites against thermal degradation. The antistatic properties of PMMA/PPy composites were demonstrated.