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Optimization of the conductivity and yield of chemically synthesized polyaniline using a design of experiments

Publication Type : Journal Article

Publisher : Journal of Applied Polymer Science

Source : Journal of Applied Polymer Science, Volume 130, Number 2, p.1047-1057 (2013)

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Keywords : Acid concentrations, Chemical oxidative polymerization, Conducting polymers, Design of experiments, Electrical conductivity, Four-point probe conductivity measurement, Fourier transform infrared spectroscopy, Methane sulfonic acid, Microscopic examination, Optimization, Optimized conditions, Oxidants, Polyaniline, Polyanilines (PAni), scanning electron microscopy, Spectroscopy, Structure property relation, X ray diffraction

Campus : Bengaluru, Coimbatore

School : School of Engineering

Department : Chemical, Civil, Computer Science

Verified : Yes

Year : 2013

Abstract : 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. © 2013 Wiley Periodicals, Inc.

Cite this Research Publication : E. J. Jelmy, Ramakrishnan, S., Dr. Sriram Devanathan, Dr. Murali Rangarajan, and Dr. Nikhil K. Kothurkar, “Optimization of the conductivity and yield of chemically synthesized polyaniline using a design of experiments”, Journal of Applied Polymer Science, vol. 130, pp. 1047-1057, 2013.

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