Chemical oxidative synthesis and characterization of poly(o-phenylenediamine) doped with different acids

Abstract

Poly o-phenylenediamine (PoPD) doped with different acids such as hydrochloric, sulfuric, formic, phosphoric and glacial acetic acids was synthesized by a chemical oxidative polymerization technique using potassium dichromate as oxidizing agent. The polymer products were characterized by FT-IR and UV-visible spectroscopy. The FT-IR spectra showed shift to lower wave number in case of PoPD-H2SO4 and PoPD-H3PO4, indicating that the doping degree of PoPD in H2SO4 and H3PO4 are the greatest. A successful doping of PoPD in H3PO4 was observed in UV-vis spectroscopy. The three steps decomposition observed from the thermogravimetric analysis (TGA). The second step loss related to the loss of the dopant is found to be higher in H3PO4 doped polymer. The electrical conductivity values of PoPD-H2SO4 and PoPD-H3PO4 are found to be the highest among the other acids. KEYWORDSDopant Conductivity Oxidizing agent Doped polymer Thermal analysis Poly o-phenylenediamine Cite this: Eur.

Synthesis, characterization, morphology and adsorption performance towards Cu+2 ions of nano-sized copolymers of anthranilic acid and o-phenylenediamine poly(AA-co-o-PD)

“…Ortho phenylenediamine (o-PD) has a structure consisting of 1,4-substituted benzenoid and quinoid moieties was proposed for the polymer obtained electrochemically and it exhibits high thermostability [24]. o-PD is soluble electroactive in the polymer due to its dissolution in organic solvents.…”

Evaluation of the Thermal Stability of Poly (O–phenylenediamine) (PoPD) by Thermogravimetric Analysis (TGA)

“…Polymerization of a conducting polymer may be performed with chemical or electrochemical [2] methods. Different chemical oxidizing agents such as potassium dichromate [3,4], potassium iodate, [5], hydrogen peroxide [6], Ferric chloride or ammonium persulphate [7] can be used. Polymers have been extensively studied as new materials for electronic and optoelectronic applications.…”

Copolymerization of poly (o-phenylenediamine-co-o/p-toluidine) via the chemical oxidative technique: synthesis and characterization

“…[8][9] Polymerization of a conducting polymer may be performed with chemical 10 or electrochemical 11 methods. Different chemical oxidizing agents such as potassium dichromate, [12][13][14] potassium iodate, 15 hydrogen peroxide, 16 ferric chloride or ammonium persulphate 17 can be used. The application of polyaniline is limited because of its poor processability, 18 which is true for most conducting polymers.…”