Abstract
DC and AC conductions in NaTCNQ–polymer composites of high NaTCNQ content composed of sodium 7,7,8,8-tetracyanoquinodimethanide (NaTCNQ) grains dispersed in poly(vinyl chloride)(PVC)–polyurethane(PU) blend polymer have been studied. In the composites, NaTCNQ is mainly dispersed granularly and a slight proportion of NaTCNQ is molecularly. The DC conduction has nonohmic characteristics and shows straight lines in logσdc−E1/2 plots. On the other hand, its temperature dependence shows a linear relation in logσdc−1/T1/4 plots. The DC conduction is interpreted in terms of the variable range hopping (VRH) conduction with the Poole–Frenkel-like field dependence. It is deduced that the Poole–Frenkel (PF) mechanism mainly contributes to the generation of carriers and the carriers are transported due to the VRH mechanism; that is, the VRH carriers will generate under PF field dependence. The frequency dependence of AC conductivity shows that the VRH is a multiple process and the multiplicity increases with temperature and NaTCNQ content.
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Kishimoto, Y. DC and AC Conductions in Sodium 7,7,8,8-Tetracyanoquinodimethanide-Polymer Composites. Polym J 18, 639–644 (1986). https://doi.org/10.1295/polymj.18.639
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DOI: https://doi.org/10.1295/polymj.18.639