Abstract: Copolymers of aniline and o-methoxyaniline were synthesized by solid-state polymerization method using methanesulphonic acid as the doping acid. The resultant copolymers were characterized by FTIR, UV-Vis, TEM, X-ray diffraction, cyclic voltammetry and conductivity measurements. The results showed that the copolymers prepared under different aniline and o-methoxyaniline molar ratios displayed an emeraldine salt phase, and the doping degree of copolymers decreased with increasing content of o-methoxyaniline in monomers. The as-prepared copolymers had a high crystallinity and displayed a fibrillar morphology. The copolymer prepared under the molar ratio of 1∶1, exhibited a higher electrochemical activity than the others, and its conductivity was 1.65 S/cm.

Key words: solid-state synthesis, copolymer, aniline, o-methoxyaniline