Strongly Non‐linear Carbon Nanofibre Influence on Electrical Properties of Polymer Composites

Composites of carbon nanofibres (CNF) (30–50 nm diam., length up to 1 µm) in two polymer matrices (polybutadiene‐styrene and polypyrrhol) show strong non‐linearities of conductivity vs. CNF concentration. We have studied their voltage‐current dependencies, and observed correlation of their extrema and layer morphology. Multistability of conductivity is discovered, with apparent effect of magnetic field effect on it in polypyrrhol‐based composites. In addition CNF spatial configuration influence on layers' conductivity is discussed.