Polyaniline. Preparation of a conducting polymer(IUPAC Technical Report) (original) (raw)
Related papers
Study of the Electrical Characteristics of Polyaniline Prepeared by Electrochemical Polymerization
Energy Procedia, 2012
Polyaniline (PAni) is one of imported polymer for synthesis solar cells .The quality of film depended on the method of polymerization. In this research PAni have been prepared by the electrochemical polymerization of aniline on stainless steel electrode. The electrical conductivity of these films was measured by two-probe method .The electrical conductivity is influenced by preparation conduction such as concentration of H 2 SO 4 and current density .The conductivity between (0.1 -10 -10 ) S/cm depends on PH and current density . The best electrical conductivity about (0.1) S/cm was found PH at (4.2) and current density 0.3mA/cm2.
Journal of Applied Polymer Science, 2013
The electrical conductivity and yield of polyaniline (PANi) were optimized using a design of experiments (DOE). PANi samples were synthesized by the chemical oxidative polymerization of aniline using methane sulfonic acid as the dopant acid and ammonium persulfate as the oxidant. The main factors in the synthesis of PANi that can affect the conductivity were identified as (i) the concentration of dopant acid, (ii) oxidant-to-monomer ratio, and (iii) the addition rate of oxidant to monomer. Using a Box-Behnken DOE method the regression equation, main effects plots, contour plots, and optimization plots for conductivity and yield were generated and analyzed. Under the optimized conditions of dopant acid concentration of 0.9M, an oxidant addition rate of 30 mL/h and an OM ratio of 0.9, PANi with a conductivity of 1.95 S/cm and yield of 95% was obtained. The observed trends in the four-point probe conductivity measurements were correlated with the polymer structure using fourier transform infrared spectroscopy, X-ray diffraction studies, and scanning electron microscopy.
Synthesis and Characterization of Polyaniline Based Conducting Polymers
Present work deals with the synthesis of Polyaniline, polynitro aniline, poly m-toludine and poly o-toludine polymers by chemical oxidation method using ammonium per sulfate as chemical oxidant. The yield of all polymers was higher than 90%.The synthesized polymeric material have been characterized by FTIR spectroscopy. FTIR and SEM studies of polymer show the structural and slight morphological changes with change in substituent in monomer units
The effect of hydrochloric acid-doped polyaniline to enhance the conductivity
IOP Conference Series: Materials Science and Engineering, 2019
The studies of polyaniline (PANI) and other conducting polymers have shown that they possess semiconducting-properties. PANI is one of the conductive polymers used as a battery electrode, corrosion inhibitor, and sensor. The study aims to investigate the effect of hydrochloric acid dope to PANI. Polyaniline was synthesised by the oxidation of aniline with ammonium peroxidisulphate (APS) as an oxidant by the interfacial method in an immiscible organic/aqueous biphasic system, with hydrochloric acid as a dopant. The result showed that, PANI has conductivities in the range of 3.00.10-2-7.00.10-2 S.cm-1. The morphology and molecular structure of PANI were characterised by scanning electron microscopy (SEM), and FTIR respectively.
Synthesis and Characterization of Polyaniline Based Conducting Polymers line
Present work deals with the synthesis of Polyaniline, polynitro aniline, poly m-toludine and poly o-toludine polymers by chemical oxidation method using ammonium per sulfate as chemical oxidant. The yield of all polymers was higher than 90%.The synthesized polymeric material have been characterized by FTIR spectroscopy. FTIR and SEM studies of polymer show the structural and slight morphological changes with change in substituent in monomer units.
Polyaniline Conducting Electroactive Polymers Thermal and Environmental Stability Studies
E-Journal of Chemistry, 2006
In the current studies, polyaniline (PANi) was prepared both chemical and electrochemically in the presence of different bronsted acids from aqueous solutions. The effect of thermal treatment on electrical conductivity, and thermal stability of the PANi conducting polymers were investigated using 4-point probe and TGA techniques respectively. It was found that polymer prepared by CV method is more thermally stable than those prepared by the other electrochemical techniques. In this paper we have also reviewed some fundamental information about synthesis, general properties, diverse applications, thermal and environmental stability of polyaniline conducting polymers.
Journal of Polymer Research, 2011
Conductive polyaniline has been prepared by solid-solid reaction using ammonium peroxydisulfate as an oxidant. The obtained polymer was examined by X-ray diffraction, UV visible, FTIR spectroscopy, thermogravimetric analysis and impedance spectroscopy. The effect of oxidant/ monomer molar ratio (R) on the structure and electrical properties of polymer has been examined. The analyses of X-ray diffraction patterns demonstrated that polyaniline prepared by this method is more crystalline than that obtained by conventional solution method. The FTIR spectroscopy showed that the emeraldine salt has been formed. The electrical properties were measured at different temperatures in the range of 296-523 K. The ac conduction shows a regime of constant dc conductivity at low frequencies and a crossover to a frequency-dependent regime of the type A ω S at high frequencies.