The influence of ultraviolet radiation on electrical relaxation processes within the temperature area of stained glass films of PET

Authors

  • Ivan A. Fedorov Herzen State Pedagogical University of Russia
  • Nikita P. Bebenin Herzen State Pedagogical University of Russia
  • Anastasiya V. Stepchenkova Herzen State Pedagogical University of Russia
  • Elena А. Volgina Herzen State Pedagogical University of Russia https://orcid.org/0000-0002-1536-5841
  • Dmitry E. Temnov Herzen State Pedagogical University of Russia https://orcid.org/0000-0002-9560-4346

DOI:

https://doi.org/10.33910/2687-153X-2026-7-2-74-78

Keywords:

poly(ethylene terephthalate), thermostimulated depolarization, glass transition temperature, UV radiation, electrical relaxation

Abstract

The electrical relaxation processes observed in poly(ethylene terephthalate) were investigated using thermal activation spectroscopy. In the area of glass transition temperature of this polymer, two relaxation processes were detected — in the area of 60°C and 80°C. Ultraviolet radiation caused a significant change in the intensity of these processes. Relaxation around 60 °С is related to the glass transition process in the amorphous phase of poly(ethylene terephthalate). Relaxation in the region of 80 °C may be related to a part of the amorphous phase at the surface of crystals (rigid amorphous fraction) characterized by reduced mobility of molecular segments. After UV irradiation of this polymer, the relative content of this fraction increases substantially.

References

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Published

30.06.2026

Issue

Vol. 7 No. 2 (2026)

Section

Condensed Matter Physics

License

Copyright (c) 2026 Ivan A. Fedorov, Nikita P. Bebenin, Anastasiya V. Stepchenkova, Elena А. Volgina, Dmitry E. Temnov

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