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Mössbauer studies of iron stabilised polymethacrylates

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Abstract

Polymethyl methacrylate (PMMA), polyethyl methacrylate (PEMA) and polybutyl methacrylate (PBuMA) containing ferric chloride and ferrous sulphate as stabilisers, were prepared by free radical polymerization. Mössbauer spactra of ferrous sulphate stabilised polymers don't show any change in the value of isomer shift (1.30 mm/s) while quadrupole splitting values are quite different from those for pure ferrous sulphate. This indicates that environment of Fe2+ moiety changes in polymers and thus stabilises the polymers. In case of ferric chloride stabilised polymers the isomer shift values don't differ significantly for different polymethacrylates but quadrupole splitting values increase from polymethyl methacrylate to polybutyl methacrylate. The TGA analysis shows that the inclusion of iron salts stabilises the polymers by 40°C (approx.) and at higher temperatures α-Fe2O3 is formed.

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Authors and Affiliations

  1. Department of Chemistry, Indian Institute of Technology, 110016, New Delhi, India

    A. S. Brar & G. S. Kapur

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  1. A. S. Brar
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  2. G. S. Kapur
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Brar, A.S., Kapur, G.S. Mössbauer studies of iron stabilised polymethacrylates. Hyperfine Interact 45, 323–329 (1989). https://doi.org/10.1007/BF02405895

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  • DOI: https://doi.org/10.1007/BF02405895

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