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http://dx.doi.org/10.5012/jkcs.2014.58.3.289

Electrochemical Study of the Copolymer Formation Between o-Chlorophenol and o-Hydroxyphenol  

Sayyah, Said M. (Polymer Research Laboratory, Chemistry Department, Faculty of Science, Beni-Suef University)
Abd-Elrehim, Said S. (Chemistry Department, Faculty of Science, Ain Shams University)
Azooz, Rehab E. (Polymer Research Laboratory, Chemistry Department, Faculty of Science, Beni-Suef University)
Mohamed, Fatma (Polymer Research Laboratory, Chemistry Department, Faculty of Science, Beni-Suef University)
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Abstract
Electrochemical copolymerization of o-chlorophenol (oCP) with o-hydroxyphenol (oHP) was carried out in aqueous $H_2SO_4$ by using cyclic voltammetry (CV) technique. In addition, CV was used to evaluate the differences in electrochemical characteristics of the copolymer in comparison with the corresponding homopolymers, poly(o-chlorophenol) (PoCP) and poly(o-hydroxyphenol) (PoHP). The variation of peak currents with respect to sweep rates was compared between copolymer and homopolymers, PoCP and PoHP, films. Further support for copolymer characterization was obtained by recording UV-visible, IR spectra and elemental analysis. The mechanism of the electrochemical polymerization has been discussed. The monomer reactivity ratios ($r_1$ and $r_2$) were calculated using Fineman-R$\ddot{o}$ss method and was found to be 0.4 and 1.3 repetitivelly and the copolymer structure is a block structure and more rich in oHP units.
Keywords
Block copolymers; Electropolymerization; Reactivity ratios; Phenols;
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