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Silver Composites of Ultradisperse Polytetrafluoroethylene and Its Fractions in Supercritical Carbon Dioxide: Synthesis and Structural Study

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Abstract

Ultradisperse polytetrafluoroethylene is separated into fractions soluble and insoluble in supercritical carbon dioxide. The initial polymer and its soluble and insoluble fractions are impregnated with silver(I) (1,5-cyclooctadiene)-1,1,1,5,5,5-hexafluoroacetylacetonate in supercritical carbon dioxide solution for 6.6 h under thermodynamic conditions at 65°С and 8 MPa followed by reduction of the metal in an atmosphere of hydrogen for 6 h at 65°С and 1.2 MPa. According to X-ray fluorescence analysis, the content of the metal attains 2.4 wt %. Ag-polymer composites are studied by X-ray fluorescence spectroscopy, transmission electron microscopy, small-angle X-ray scattering, and X-ray photoelectron spectroscopy. It is shown that silver in the form of nanoparticles with a size of 1.0–7.5 nm is localized largely in the soluble low molecular weight fraction.

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Funding

This study was supported by the RAS Presidium (project P13-2019-1) and was carried out within the framework of the State Task for the Federal Research Center Crystallography and Photonics, RAS. The study was performed with using the equipment of the Center of Molecular Structure Investigation of INEOS RAS with supporting by the RF Ministry of Education and Science.

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Authors and Affiliations

  1. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991, Moscow, Russia

    E. E. Said-Galiyev, S. S. Abramchuk, A. R. Khokhlov, A. V. Naumkin & V. N. Talanova

  2. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia

    Z. N. Nysenko

  3. Shubnikov Institute of Crystallography, Federal Research Center Crystallography and Photonics, Russian Academy of Sciences, 119333, Moscow, Russia

    E. V. Shtykova & V. V. Volkov

  4. Plant Pathology Research Institute, Agricultural Research Center, 12619, Giza, Egypt

    K. A. Abd-Elsalam

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  1. E. E. Said-Galiyev
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  2. S. S. Abramchuk
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  3. A. R. Khokhlov
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  4. A. V. Naumkin
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  7. E. V. Shtykova
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  8. V. V. Volkov
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  9. K. A. Abd-Elsalam
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Correspondence to E. E. Said-Galiyev.

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Translated by T. Soboleva

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Said-Galiyev, E.E., Abramchuk, S.S., Khokhlov, A.R. et al. Silver Composites of Ultradisperse Polytetrafluoroethylene and Its Fractions in Supercritical Carbon Dioxide: Synthesis and Structural Study. Polym. Sci. Ser. B 62, 125–136 (2020). https://doi.org/10.1134/S1560090420020049

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