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<p>The growing accumulation of polypropylene (PP) waste poses a significant environmental challenge due to its resistance to natural degradation. In this study, gamma irradiation was applied as an eco-friendly approach to induce controlled structural modifications in PP waste, enhancing its recyclability. Differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and UV–Vis spectroscopy were employed to investigate radiation-induced transformations at different dose range (XRD: 684, 1368 and 2053&#xa0;kGy; DSC and FTIR: 86, 432 and 720&#xa0;kGy; UV–Vis: 32, 95 and 190&#xa0;kGy). In this study, parameters such as the melting and crystallization size and degree depending on the irradiation dose, changes in the intensity of carbonyl and carboxyl groups, as well as the absorption intensity in the UV–Vis region (optical transparency), were determined. DSC revealed dose-dependent variations in melting and crystallization behavior, reflecting the interplay between chain scission and crosslinking. FTIR confirmed oxidation and the formation of carbonyl and hydroxyl groups, while XRD indicated changes in crystallite size and overall crystallinity. UV–Vis spectra showed a red shift, suggesting modifications in the polymer’s electronic structure. UV–Vis spectra showed changes in absorption intensity, indicating radiation-induced modifications in the optical properties of the plastic waste. Overall, gamma irradiation effectively tailors the physicochemical (structural, mechanical and optical) properties of PP, providing a sustainable strategy for converting non-degradable plastic waste into value-added materials, in line with circular economy and environmental protection goals.</p>

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Radiation-induced physicochemical changes in polypropylene waste under gamma irradiation

  • 期刊论文

  • 发表日期：

    2026年6月20日

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  • U. A. Gulieva,
  • M. A. Gurbanov,
  • E. V. Mirzazada,
  • A. A. Nabiyev,
  • I. A. Amiraslanov,
  • S. A. Kerimov,
  • G. F. Orujova

摘要

The growing accumulation of polypropylene (PP) waste poses a significant environmental challenge due to its resistance to natural degradation. In this study, gamma irradiation was applied as an eco-friendly approach to induce controlled structural modifications in PP waste, enhancing its recyclability. Differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and UV–Vis spectroscopy were employed to investigate radiation-induced transformations at different dose range (XRD: 684, 1368 and 2053 kGy; DSC and FTIR: 86, 432 and 720 kGy; UV–Vis: 32, 95 and 190 kGy). In this study, parameters such as the melting and crystallization size and degree depending on the irradiation dose, changes in the intensity of carbonyl and carboxyl groups, as well as the absorption intensity in the UV–Vis region (optical transparency), were determined. DSC revealed dose-dependent variations in melting and crystallization behavior, reflecting the interplay between chain scission and crosslinking. FTIR confirmed oxidation and the formation of carbonyl and hydroxyl groups, while XRD indicated changes in crystallite size and overall crystallinity. UV–Vis spectra showed a red shift, suggesting modifications in the polymer’s electronic structure. UV–Vis spectra showed changes in absorption intensity, indicating radiation-induced modifications in the optical properties of the plastic waste. Overall, gamma irradiation effectively tailors the physicochemical (structural, mechanical and optical) properties of PP, providing a sustainable strategy for converting non-degradable plastic waste into value-added materials, in line with circular economy and environmental protection goals.