Polyaniline and polypyrrole composites were synthesized by doping during polymerization with a variety of organic and inorganic groups. Their direct-current (d.c.) conductivity was measured and their activation energy was estimated at room temperature. From thermopower measurements on polypyrrole composites a “metallic” p-type conductivity in the fibrils was revealed, although for polyaniline an n-type to p-type change of the carriers into the metallic “islands” was displayed at about 320 K. The introduction of the various groups, in addition to this change in the electrical properties, also resulted in conducting polymers capable of surface complexation with metal ions.
Polymer Activation Energy Fibril Electrical Property Polyaniline
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