Study of the effect of electric field on the charge states of polypropylene doped with ZrO2 nanoparticles by the TSD method


Ibrahimova H. S., Ibragimov T. D.

International Journal of Polymer Analysis and Characterization, 2025 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Publication Date: 2025
  • Doi Number: 10.1080/1023666x.2025.2531053
  • Journal Name: International Journal of Polymer Analysis and Characterization
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: 77.65.-j, 77.84.Lf, electric field, energetic traps, energy activation, isotactic polypropylene, Zirconia nanoparticles
  • Open Archive Collection: Article
  • Azerbaijan State University of Economics (UNEC) Affiliated: No

Abstract

Composites based on polypropylene and ZrO2 nanoparticles (concentration of 3 vol.%), at which the highest electret properties are observed, are studied by the thermally stimulated depolarization (TSD) current method after treatment of electrostatic field with different intensities (5·106 V/m,107 V/m and 1.5·107 V/m). The measurement of TSD currents revealed the presence of two main peaks in the spectra of the nanocomposite at 25–35 °C and 120–140 °C. They appear as a result of the destruction of one or another category of traps of injected charges. Calculations have shown that there is a monomolecular mechanism of charge recombination in these nanocomposites. It is shown that increasing the applied electric field leads to an increase in the intensity of the thermograms, reaching a maximum at 107 V/m and then decreasing at 1.5·107 V/m. The activation energy, the total accumulated charge, and the relaxation time have a similar behavior. It is due to the increase in injected charges. The formation of an internal electric field prevents this process when the external electric field intensity is higher.