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Physicomechanical Characteristics of Composite Based on Polyimide Matrix Filled with Tungsten Oxide

  • MATERIALS FOR AVIATION AND SPACE TECHNOLOGIES
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Inorganic Materials: Applied Research Aims and scope

Abstract

The article presents the possibility of obtaining polymer composite materials based on thermoplastic polyimide and tungsten oxide (WO3) modified with a hydrophobic silicone fluid. Data on surface microscopy, Vickers microhardness, density, and thermal stability of composites with different tungsten oxide contents are presented. As a result of modifying tungsten oxide, its surface becomes hydrophobic, and the contact angle increases from 31° to 101°. The microstructure of the surface of composites has a fine-grained structure without microcracks and chips. The lowest density material has no filler. With increasing filler content, the density increases. When the content of the filler is 80 wt %, the density is 4.35 g/cm3. The optimum content of tungsten oxide filler is 60 wt % as measured by the surface microhardness. The work shows that the introduction of the proposed filler significantly increases the heat resistance of polyimide. Pure polyimide is stable up to 425°С, and at a temperature of 680°С, its full thermal decomposition takes place. With increasing content of modified tungsten oxide in the composite, the rate of mass loss decreases. In the composite containing 60 wt % filler at 680°C, the mass loss is 38%.

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Funding

This work was carried out under a grant from the Russian Science Foundation (project no. 19-19-00316).

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Authors and Affiliations

  1. Belgorod State Technological University, 308012, Belgorod, Russia

    V. I. Pavlenko & N. I. Cherkashina

  2. National Research University Higher School of Economics, 101000, Moscow, Russia

    G. G. Bondarenko

Authors
  1. V. I. Pavlenko
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  2. G. G. Bondarenko
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  3. N. I. Cherkashina
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Correspondence to V. I. Pavlenko, G. G. Bondarenko or N. I. Cherkashina.

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Translated by V. Selikhanovich

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Pavlenko, V.I., Bondarenko, G.G. & Cherkashina, N.I. Physicomechanical Characteristics of Composite Based on Polyimide Matrix Filled with Tungsten Oxide. Inorg. Mater. Appl. Res. 11, 304–311 (2020). https://doi.org/10.1134/S2075113320020306

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  • DOI: https://doi.org/10.1134/S2075113320020306

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