Preparation and Characterization of Conducting Polymer Latices by Chemical Polymerization of Aniline or Anisidine in Presence of Latex: Study of Their Electroactivity and Anti-Corrosion Properties

Poly (vinylacetate-co-butylmethacrylate) was prepared in presence of potassium persulphate as an oxidizing agent in aqueous solution of dodecylbenzene sulfonate sodium as an emulsifying agent. Then, aniline was polymerized by chemical oxidation method at three different concentrations of aniline monomer (0.1, 0.2 and 0.3 M) in toluene in presence of poly(vinylacetate-co-butylmethacrylate) in order to obtain polyaniline/poly(vinylacetate-co-butylmethacrylate). To prepare conducting-latex of polyanisidine/poly(vinylacetate-co-butylmethacrylate) the same method was employed as above for aniline monomer in obtaining conducting polyaniline/poly(vinylacetate-co-butylmethacrylate) latex. In addition, the purification of conducting-latex polymers, polyaniline/poly(vinylacetate-co-butylmethacrylate) and polyanisidine/poly(vinylacetate-co-butylmethacrylate) was conducted and preparation of tin layer films of conducting-latex polymers was carried out by casting method on glassy lames. The electroactivity properties of the prepared latex-polymers, polyaniline/poly(vinylacetate-co-butylmethacrylate) and polyanisidine/poly(vinylacetate-co-butylmethacrylate) were investigated by cyclic voltammetery (CV). The voltamogrames showed that the latex films were electroactive. Because of conductivity and electroactivity, the obtained films may find applications in anti-corrosion coatings. The anti-corrosion properties of conducting-latex polymers were studied on aluminum surface by impedance technique. The structure of the prepared conducting-latex polymers was confirmed by Fourier transform infrared (FTIR). Finally, the electrical conductivity of synthesized conducting-latex polymers, polyaniline/poly(vinylacetate-co-butylmethacrylate) and polyanisidine/poly(vinylacetate-co-butylmethacrylate) was measured by four probe technique.