Mechanisms polyaniline chemical polymerization

Chan et al. [188] first prepared the homopolymer of anthranilic acid and its copolymer with aniline by chemical polymerization in order to improve the solubility of polyaniline, to study the self-doping mechanism, and to evaluate thermal properties. The chemical polymerization of anthranilic acid was carried out using ammonium persulfate as the oxidant in the presence and absence of 1 M HCl. Copolymers of anthranilic acid and aniline were prepared in a similar manner by varying the monomer feed ratios in HCl at a pH of about 0.1. The... 

For MIP deposition at relatively low monomer conversion, other polymerization mechanisms had also been used. For example, a functional polyaniline layer with about 100 nm thickness, coating the bottom of polystyrene microplates, was obtained from 3-aminophenylboronic acid in aqueous buffer solution, initiated by chemical... 

As an indirect method toward processability, conducting colloids of polypyrrole and polyaniline have been prepared via a dispersion polymerization route. In this approach, the conducting polymer is che-mically synthesized in the presence of a suitable polymeric surfactant. The surfactant adsorbs or is chemically grafted onto the conducting polymer particle or chain and prevents macroscopic precipitation by a steric stabilization mechanism. The result is a stable dispersion of submicronic conducting polymer particles which consist of a conducting core and a thin outer layer of the non conducting surfactant as shown schematically in Fig. 2. 

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