Polythiophene/insulating polymer composites conductivity

I 9 Enhanced Electrical Conductivity of Polythiophene/Insulating Polymer Composite... 

Lu G, Tang H, Qu Y, Li L, Yang X (2007) Enhanced electrical conductivity of highly crystalline polythiophene/insulating-polymer composite. Macromolecules 40 6579-6584... 

Intercalation of electroactive polymers such as polyaniline and polypyrrole in mica-type layered silicates leads to metal-insulator nanocomposites. The conductivity of these nanocomposites in the form of films is highly anisotropic, with the in-plane conductivity 10 to 10 times higher than the conductivity in the direction perpendicular to the film. Conductive polymer/oxide bronze nanocomposites have been prepared by intercalating polythiophene in V2O5 layered phase, which is analogous to clays. °° Studies of these composites are expected not only to provide a fundamental understanding of the conduction mechanism in the polymers, but also to lead to diverse electrical and optical properties. 

The optical and electronic properties of blends of soluble polythiophene derivatives and polystyrene (PSt) were investigated over the full range of compositions. The polyblend films, made conducting by charge transfer doping (reaction with NOPFe in acetonitrile) display an insulator-metal transition at the percolation threshold a volume fraction of 16% conducting polymer in PSt. 

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