This paper reports on the piezoresistive behavior of polymer based nanocomposites, composed of
poly(vinylidene fluoride) – PVDF and carbon nanotubes (CNTs). The samples were prepared by hot pressing
with CNT sample concentrations up to loadings of 10 wt.%. The phase present in the polymer was the
-phase. The correlation between the electrical resistivity and mechanical solicitations is presented in
this work for the different composites and for varying mechanical solicitations. The values of the gauge
factor, ranging up to 6.2, and the linearity of the response over a wide strain range shows the viability of
these materials to be used as piezoresistive sensors. The stability of the signal, the time response and the
temperature behavior were also evaluated. The observed electrical and electromechanical behavior can
be explained in the framework of the percolation theory.