2026 (3) 2

https://doi.org/10.15407/polymerj.48.03.108

structural, thermal, and electrodynamic properties of carbon nanotube-filled polyimide composites based on different polymer matrices

Tetyana SHANTALII^* (ORCID: 0000-0001-8540-217X)

Institute of Macromolecular Chemistry, National Academy of Sciences of

Ukraine, 48 Kharkivske Highway, 02155 Kyiv, Ukraine

e-mail: shantaliitatiana@gmail.com

Mykola BORYSENKO (ORCID: 0000-0001-8707-1749)

Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine

17, Oleh Mudrak str. 03164, Kyiv, Ukraine

e-mail: borysenko@yahoo.com

Liudmyla GRISHCHENKO (ORCID: 0000-0002-0342-4859)

 Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine

17, Oleh Mudrak str. 03164, Kyiv, Ukraine

e-mail: liudmyla.grishchenko@gmail.com

Volodymyr MALYSHEV (ORCID: 0000-0002-7286-2166)

Educational and Scientific Institute of High Technologies, Taras Shevchenko National University of Kyiv, 4-g Glushkova Ave., 03022 Kyiv, Ukraine

e-mail: malyshev@knu.ua

Valeriy KLEPKO (ORCID: 0000-0001-8089-8305)

 Institute of Macromolecular Chemistry, National Academy of Sciences of

Ukraine, 48 Kharkivske Highway, 02155 Kyiv, Ukraine

e-mail: klepko_vv@ukr.net

Vladyslav LISNYAK (ORCID: 0000-0002-6820-1445)

Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine

17, Oleh Mudrak Str. 03164, Kyiv, Ukraine;

Institute of Macromolecular Chemistry, National Academy of Sciences of

Ukraine, 48 Kharkivske Highway, 02155 Kyiv, Ukraine

e-mail: lisnyak@nas.gov.ua

 

^*Corresponding author.

E-mail:  shantaliitatiana@gmail.com

Polimernyi Zhurnal, 2026, 48, no. 3: 108–122

Section: Structure and properties

Language: Ukrainian.

Received 07.07.2026

Accepted 11.09.2026

Published 19.10.2026

Abstract

Polyimide composites based on two different polymer matrices and filled with carbon nanotubes (CNTs) were characterized by FTIR spectroscopy, X-ray diffraction, and thermogravimetric analysis, and their microwave characteristics were also investigated. The materials studied included composites based on a linear polyimide matrix containing 0.06 and 0.6 wt.% CNTs and a composite based on a polyimide matrix with cardo substituents containing 5 wt.% CNTs. The FTIR spectra of the investigated composites exhibited absorption bands characteristic of polyimides. X-ray diffraction analysis revealed changes in the diffraction profile with increasing CNT content in the linear PI matrix, as well as pronounced structural differences for the composite based on the PI with cardo substituents. The composite based on the polyimide with cardo substituents containing 5 wt.% CNTs exhibited higher thermo-oxidative stability during the main degradation stage, as well as higher levels of electromagnetic-wave absorption and reflection in the Ka-band compared with the composites based on the linear PI. The observed differences may result from the combined effects of the polymer-matrix structure and CNT content.

Keywords: polyimide; carbon nanotubes (CNTs); cardo substituents; thermo-oxidative stability; microwave properties.

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