In this paper we investigate the effect of hydrostatic pressure on the electrical conductivity of polypyrrole-polyaniline conductive (protonated) blends of various compositions. Results are presented for thermally aged blends as well. The modification of the conductivity due to pressure is more pronounced in the fresh samples than in the aged ones. The phenomenon is discussed within the frame of the granular model. The percentage variation of the conductivity upon pressure change for the polypyrrole rich blends is not influenced by the ageing process. This feature suggests that these blends could possibly be used as pressure sensors, which are insensitive to thermal ageing.
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Papathanassiou et al. (2002) studied this question.
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