Sensing parameters as a function of the chemical structure and thickness of two poly(styrene)-type based composites with carbon black

摘要: Sensing parameters of polymer composite layers were studied as a function the matrix structure and initial resistance layers. Composites Poly(styrene) 4-Chloro-poly(styrene) at same volume fraction carbon black (8.7% V/V) prepared by ultrasonic dispersion. Composite with different thicknesses resistances deposited spin coating technique on flexible substrates from commercial cellulose acetate foils.  Both kind with  10, 50 100 kΩ exposed to Acetone, Tetrahydrofuran, Chloroform Toluene.  Results evidenced that selectivity is very dependent chemical sensitivity film electrical resistance.  PS-based series selective Tetrahydrofuran whereas 4ClPS-based Acetone expected due their solubility parameters. For both increased for less than resistances. all tested solvents composites showed higher sensitivities composites.  The response times into range 2 150 s recovery in 30 2000 s.