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Rutherford backscattering spectrometry and computer simulation for the in-depth analysis of chemically modified poly(vinylidene fluoride)

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Abstract

The alkaline treatment of poly(vinylidene fluoride) (PVdF), in the presence of phase transfer catalysts (PTCs) has been investigated. Rutherford backscattering spectrometry (RBS) has been used to determine the depth of modification achieved and to provide compositional depth profiles of modified PVdF samples. The complex chemical nature of the modified substrate, and the overlap of the elemental scattering edges within the depths involved (up to 1.4 μm), create RBS spectra which are difficult to interpret. The DataFurnace software has been applied to the data, leading to excellent results. Defluorination and oxygenation of PVdF occurs on treatment with NaOH and PTC. Through the use of samples prepared with the aim of establishing the kinetics of the modification, a mechanism concerning elimination of fluorine followed by oxygenation, is shown to occur. The RBS analysis indicates that the kinetics of the defluorination reaction follows the Case 1 (Fickian) diffusion law, and that the depth of treatment is of the order of 1.4 μm.

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Authors and Affiliations

  1. School of Mechanical and Materials Engineering, University of Surrey, Guildford, Surrey, GU2 7XH, UK

    G. J. Ross, M. P. Hill & J. F. Watts

  2. Instituto Tecnológico e Nuclear, E.N. 10, 2686-953, Sacavém, Portugal

    N. P. Barradas

  3. School of Electronic Engineering, Information Technology and Mathematics, University of Surrey, Guildford, Surrey, GU2 7XH, UK

    C. Jeynes

  4. Innogy Limited, Harwell International Business Centre, Harwell, Didcot, Oxon, OX11 0QA, UK

    P. Morrissey

Authors
  1. G. J. Ross
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  2. N. P. Barradas
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  3. M. P. Hill
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  4. C. Jeynes
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  5. P. Morrissey
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  6. J. F. Watts
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Ross, G.J., Barradas, N.P., Hill, M.P. et al. Rutherford backscattering spectrometry and computer simulation for the in-depth analysis of chemically modified poly(vinylidene fluoride). Journal of Materials Science 36, 4731–4738 (2001). https://doi.org/10.1023/A:1017979005467

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