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Abstract <p>Gamma irradiation experiments were conducted to investigate the potential for improving the electrical properties of pure high-density polyethylene (HDPE) and an HDPE/α-Fe<sub>3</sub>O<sub>4</sub> polymer composite. Changes in permittivity ε', loss tangent tan δ, and AC conductivity σ<sub>ac</sub> were studied in alternating fields for unirradiated and irradiated composites in the frequency range from 25 Hz to 1 MHz at room temperature. The irradiation dose ranged from 0 to 300 kGy. The conductivity versus AC frequency is directly proportional to the frequency. The study of dielectrics determined that, with an increase in the gamma-radiation dose, the relative permittivity and loss tangent increase, whereas the relaxation time of the segmental dynamics of the polymer chain decreases for all composites. The crystal structure and surface morphology of unirradiated and irradiated films were studied using a PANalytical EMPYREAN X-ray diffractometer and a JEOL JSM-6490LV scanning electron microscope.</p>

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The Frequency and Dose Dependences of the Electrophysical Properties of HDPE/α-Fe3O4 Nanocomposites Modified by Gamma Irradiation

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • M. M. Guliev,
  • M. N. Bayramov,
  • N. Sh. Aliyev,
  • R. S. Ismayilova,
  • A. N. Nabiyeva Mammadli

摘要

Abstract

Gamma irradiation experiments were conducted to investigate the potential for improving the electrical properties of pure high-density polyethylene (HDPE) and an HDPE/α-Fe3O4 polymer composite. Changes in permittivity ε', loss tangent tan δ, and AC conductivity σac were studied in alternating fields for unirradiated and irradiated composites in the frequency range from 25 Hz to 1 MHz at room temperature. The irradiation dose ranged from 0 to 300 kGy. The conductivity versus AC frequency is directly proportional to the frequency. The study of dielectrics determined that, with an increase in the gamma-radiation dose, the relative permittivity and loss tangent increase, whereas the relaxation time of the segmental dynamics of the polymer chain decreases for all composites. The crystal structure and surface morphology of unirradiated and irradiated films were studied using a PANalytical EMPYREAN X-ray diffractometer and a JEOL JSM-6490LV scanning electron microscope.