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Polymerization of vinyl monomers

II. Ceric-formaldehyde redox system

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Summary

The kinetics of the polymerization of methyl acrylate initiated by the ceric perchlorate-formaldehyde redox system has been investigated. The rate of monomer disappearance has been found to be proportional to (a) the square of the monomer concentration, (b) the formaldehyde concentration and (c) the reciprocal of ceric ion concentration. The rate of ceric disappearance is found to be proportional to the ceric, monomer and formaldehyde concentrations. The chain-lengths have been found to increase with the monomer concentration and decrease with the ceric ion concentration. A kinetic scheme has been proposed whereby both ceric ions and the radicals produced from oxidation of formaldehyde by ceric ions have been shown to initiate the polmerization, while the termination occurs exclusively by the interaction of the chain radicals with ceric ions. The results obtained in the presence as well as absence of the reducing agent have been compared on the basis of the above kinetic scheme.

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Authors and Affiliations

  1. Department of Physical Chemistry, University of Madras, A.C. College Campus, Madras-25

    M. Santappa F.A.Sc. & V. S. Ananthanarayanan

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  1. M. Santappa F.A.Sc.
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  2. V. S. Ananthanarayanan
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Santappa, M., Ananthanarayanan, V.S. Polymerization of vinyl monomers. Proc. Indian Acad. Sci. 62, 150–158 (1965). https://doi.org/10.1007/BF03047469

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  • DOI: https://doi.org/10.1007/BF03047469

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