Abstract:

The solution was prepared by mixing PMMA/PVAc with carbon nanotubes in terahydrofuran (THF).Thin films of carbon nanotube/poly(methyl methacrylate)(PMMA)/poly(vinyl acetate)(PVAc) composite film were produced by solution casting.Electrical resistance responses of carbon nanotube/PMMA/PVAc composite film against various ethyl acetate vapors at low concentrations were investigated.The results indicated that the composites had high sensitivity to different ethyl acetate vapors concentration and the electrical resistance increased with increasing PMMA content.So compatible blends of poly(methyl methacrylate) and poly(vinyl acetate) would be a candidate to be used as a gas sensing material to detect，quantify and discriminate various organic vapors.