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Electrocopolymerization kinetics of a binary mixture of 3-chloroaniline 2-amino-4-phenylthiazole and characterization of the obtained block copolymer films

Authors

  • S. M. Sayyah,

    Corresponding author
    1. Polymer Research Laboratory, Chemistry Department, Faculty of Science, Cairo University, Beni-Suef Branch, 62514 Beni-Suef, Egypt
    • Polymer Research Laboratory, Chemistry Department, Faculty of Science, Cairo University, Beni-Suef Branch, 62514 Beni-Suef, Egypt
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  • S. S. Abd EL-Rehim,

    1. Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt
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  • M. M EL-Deeb

    1. Polymer Research Laboratory, Chemistry Department, Faculty of Science, Cairo University, Beni-Suef Branch, 62514 Beni-Suef, Egypt
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Abstract

Electrocopolymerization of a binary mixture of 3-chloroaniline and 2-amino-4-phenylthiazole on platinum electrode in acid medium was carried out under different reaction conditions such as temperature, current density, hydrochloric acid, and monomer concentrations with duration time. The initial rate of the electrocopolymerization reaction on platinum electrode is small and the rate law is Rp = K2 [D]1.29[HCl]0.97[M]1.94. The apparent activation energy is found to be 38.87 kJ/mol. The obtained copolymer film is characterized by 1H-NMR, elemental analysis, GPC IR, UV-visible, and cyclic voltammetry and compared with those of the two homopolymers. The mechanism of the electrocopolymerization reaction is also discussed and the monomer reactivity ratio (r1and r2) is calculated. The thermogravimetric analysis (TGA) is used to confirm the proposed structure and determination of the number of water molecules in the polymeric chain unit. X-ray and scanning electron microscopic analysis are used to investigate the surface morphology. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 2076–2087, 2005

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