The electrochemical polymerization of aniline has been studied in the biphasJc media. One phase comprises a polar medium containing some added electrolytes and the other a non-polar solvent containing the monomer. Ferric chloride has been used as the supporting electrolyte to catalyse the process of electropolymerization. Polyaniline was obtained in moderate yields with the highest R, of 0.0237% per hour and a maximum polymerization efficiency of 61.65 × 10 2 mol/Faraday. The observations and experimental results suggest a cationic mechanism.
Electroinitiated polymerization of urethane was carried out using electrolysis of MDI (methylene 4,4'-diphenyl diisocyanate) with polyoxypropylene glycol in dimethyl sulphoxide (DMSO) and dimethylformamide (DMF) in the presence of oxides and chlorides of Zn, Cd, Pb and Sn as supporting electrolytes. These salts also served as complexing agents. The polymer formation took place only in the cathodic compartment having good yields with highest Rp of 16"25% per h and polymerization efficiency of 30 x 102 moles of monomer converted per Faraday in DMF solvent. The mechanism of polymerization has been suggested.
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