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The structure and properties of porous poly(tetrafluoroethylene)

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Abstract

Porous materials based on poly(tetrafluoroethylene) (PTFE) in a wide range of values of porosity (φ) 65 ÷ 90% have been formed by the method of leaching a porogen. The technological parameters required to produce PTFE materials of a spatially homogeneous porous structure have been determined. The mechanism of porous space formation has been proposed. The data characterizing the permeability of porous PTFE structures and the maximum effective diameters of the pore-connecting “interporous windows” have been obtained. The data for microhardness HSa for porous PTFE have been obtained. The temperature dependence of HSa was found to have a V-shaped valley in the region of the triclinic-hexagonal phase transition. However, the hexagonal – pseudo-hexagonal phase transition entails no features in the HSa (T) curves. It is shown that the estimation of HSa can be used as a check on the spatial homogeneity of a porous structure. The porous structure in the indentation area and its recovery after the indenter removal have been examined. The significance of temperature in the recovery process has been determined.

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This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Authors and Affiliations

  1. State Biotechnological University, 44, Alchevskikh St, Kharkiv, 61002, Ukraine

    Oleksii B. Kaliuzhnyi

  2. Volodymyr Dahl East Ukrainian National University, 59-а Tsentralnyi Prospect, Severodonetsk, 93400, Ukraine

    Valeriy Ya. Platkov

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  1. Oleksii B. Kaliuzhnyi
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  2. Valeriy Ya. Platkov
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Kaliuzhnyi, O.B., Platkov, V.Y. The structure and properties of porous poly(tetrafluoroethylene). J Polym Res 29, 32 (2022). https://doi.org/10.1007/s10965-022-02887-w

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