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Electrical resistance responses of amorphous polymer composites against various organic vapors at low concentrations are investigated by using polymerization-filling fabricated carbon black/poly(butyl methacrylate) (CB/PBMA) system as the model material. The experimental results indicate that the composites have high selectivity to various organic vapors at the same concentration. In addition, the...
The synthesis of conductive composites consisting of waterborne polyurethane (WPU) and carbon black (CB) is reported. Besides the low percolation threshold (0.7–0.95 wt%), the composites are quite sensitive to organic solvent vapors regardless of their polarities as characterized by the drastic changes in conductivity. In the case of polar solvents, negative and positive vapor coefficient phenomena...
Amorphous polymer-based composites consisting of polystyrene and carbon black were developed in the current work as candidates for gas sensing materials. With the help of polymerization filling, i.e., in-situ polymerization of styrene in the presence of carbon black, the composites were provided with low percolation threshold. The experimental results indicated that the composites have selective sensitivity...
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