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|Type:||Artigo de periódico|
|Title:||High yield preparation of a soluble polyaniline derivative|
|Abstract:||The effect of pH, temperature, monomer/oxidant molar ratio, catalysts and ionic strength on the reaction yield and electrical conductivity of chemically synthesized poly(o-methoxyaniline) was studied. Based on this, poly(o-methoxyaniline) was prepared in the presence of p-toluene-sulfonic, dodecyl-benzene-sulfonic and dodecylsulfuric acids. Poly(o-methoxyaniline) was obtained with 90% yield and a conductivity of 0.1 S cm(-1) when p-toluene-sulfonic acid was used. The use of functionalized acids increased the thermal stability of the polymer in relation to HCI with no changes in the electric conductivity. The polymer is soluble in common organic solvents, enabling the preparation of films by casting. We also discuss the polymerization kinetics of o-methoxyaniline in the presence of HCI and of the functionalized acids as a function of monomer/oxidant ratio.|
|Editor:||Elsevier Science Sa Lausanne|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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