Design, synthesis and characterization of novel electroactive polyamide with amine‐capped aniline pentamer in the main chain via oxidative coupling polymerization

Abstract

By oxidative coupling polymerization of the macromonomer of oligoaniline and p-phenylenediamine we have prepared a novel electroactive polyamide, exhibiting well-defined molecular structure, interesting spectroscopic and electrochemical properties. The well-defined molecular structure of the electroactive polyamide was confirmed by FTIR, NMR spectroscopy, elemental analysis and X-ray powder diffraction (XRD) and the resulting polyamide exhibit an enhanced solubility in most of the organic solvents as compared with polyaniline. The UVVis spectra were used to monitor the chemical oxidation process of the reduced polyamide. Electrochemical activity of the polyamide was tested in 1.0M H 2 SO 4 aqueous solution and it shows three redox peaks, which is different from the polyaniline. Moreover, the thermal properties of the polyamide were evaluated by thermogravimetric analysis (TGA) and it shows moderate thermal resistance in the N 2 atmosphere. Its electrical conductivity is about 1.04 Â 10 À4 S cm À1 at room temperature upon preliminarily protonic-doped experiment.

Advanced anticorrosive coatings prepared from electroactive polyimide–TiO2 hybrid nanocomposite materials

“…For example, the preparation and electrochemical behavior of electroactive polyimide had been reported by Wang et al [16,17] and Wei et al [18]. Furthermore, the electrochemical behaviors of electroactive polyamide with amine-capped aniline pentamer prepared by oxidative coupling polymerization had also been demonstrated by Zhang and co-workers [17][18][19][20][21]. Lately, Yeh et al reported the corrosion protection effect of organo-soluble electroactive polyimide containing amine-capped aniline trimer coated onto cold-rolled steel (CRS) electrode by performing series of electrochemical corrosion measurements in saline condition [22].…”

Novel ascorbic acid sensor prepared from gold/aniline-pentamer-based electroactive polyamide composites

“…The XRD patterns of the synthesized EPA (Figure 4 curve a) show a broad peak, which is characteristic of the diffraction by the chain periodicity of EPA polymer [43].…”

Investigations on anticorrosive, thermal, and mechanical properties of conducting polyurethanes with tetraaniline pendent groups

“…Many attempts were made by researchers to graft/incorporate the oligoanilines (OANIs) into variety of conventional polymers to get electrochemical activity or conductivity to the entire polymer . Wei and coworkers prepared a new electroactive and biodegradable polylactide‐b‐(ANI) 5 ‐bpolyactide(PLA‐b‐(ANI) 5 ‐b‐PLA); water‐soluble biocompatible triblock copolymers of PEO1500‐b(ANI) 5 ‐b‐PEO1500 and PEO750‐b‐(ANI) 5 ‐b‐PEO750 were prepared by Wei and coworkers.…”

“…Many attempts were made by researchers to graft/incorporate the oligoanilines (OANIs) into variety of conventional polymers to get electrochemical activity or conductivity to the entire polymer. 19,[24][25][26][27][28][29][30][31][32][33][34][35][36][37] Wei and coworkers prepared a new electroactive and biodegradable polylactide-b-(ANI) 5 -bpolyactide(PLA-b-(ANI) 5 -b-PLA) 24 ;…”