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<p>The properties of Polysulfone electrets, thermally stimulated by depolarization current (TSDC), are investigated in the temperature range of 30 to 210 °C as a&#xa0;function of the polarizing field (5&#xa0;to 100 kV/cm) and polarizing temperature (40&#xa0;to 80 °C). The two peaks in the TSDC spectra are termed&#xa0;β and&#xa0;α, and they are located at around 68 °C and 172.5±173.5 °C, respectively. Here, β&#xa0;denotes relaxation processes, while α&#xa0;represents primary (segmental) relaxation or glass transition. These are explained by the space charge motion and dipole orientation, respectively. It is observed that the space charge peak&#xa0;(α) is more responsive to the forming rather than dipole-related parameters. A&#xa0;continuous relaxation distribution is suggested by the observed activation energy relationship for different peaks and the peak temperature parameter dependence on the polarizing temperature. To study the structural characterization, the FT-IR, UV-Vis and XRD analyses are carried out. The microstructural properties of Polysulfone are explained through the Scanning Electron Microscopy (SEM). The spectroscopic analysis confirms that Polysulfone has repeating units of ether and sulfone groups; it is an aromatic amorphous thermoplastic polymer.</p>

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Structural and electrical characterizations of polysulfone foil electrets under nonisothermal conditions

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • Rashmi J. Nayak,
  • Jyotiprakash G. Nayak,
  • Akhilesh Kumar,
  • Dipak Patil,
  • Ammar Muthanna,
  • Andrey Tyavlovsky

摘要

The properties of Polysulfone electrets, thermally stimulated by depolarization current (TSDC), are investigated in the temperature range of 30 to 210 °C as a function of the polarizing field (5 to 100 kV/cm) and polarizing temperature (40 to 80 °C). The two peaks in the TSDC spectra are termed β and α, and they are located at around 68 °C and 172.5±173.5 °C, respectively. Here, β denotes relaxation processes, while α represents primary (segmental) relaxation or glass transition. These are explained by the space charge motion and dipole orientation, respectively. It is observed that the space charge peak (α) is more responsive to the forming rather than dipole-related parameters. A continuous relaxation distribution is suggested by the observed activation energy relationship for different peaks and the peak temperature parameter dependence on the polarizing temperature. To study the structural characterization, the FT-IR, UV-Vis and XRD analyses are carried out. The microstructural properties of Polysulfone are explained through the Scanning Electron Microscopy (SEM). The spectroscopic analysis confirms that Polysulfone has repeating units of ether and sulfone groups; it is an aromatic amorphous thermoplastic polymer.