Chemical sensors based on polymer composites

The lowest percolation threshold was achieved at 2 wt.% of carbon black, which resulted in electrical resistance of 107 Ω m. Along with the filler volume the Vicat softening temperature increased at every polymer matrix for a few centigrades. At the highest filler content the tensile Young modulus of composites was four times higher, whereas elongation at break decreased substantially if compared to the net polymers. Melt viscosity increased with carbon black content, making composites hardly processable at high filler loadings.