Post-γ-irradiation effects in nano-SiO2 particle reinforced high-density polyethylene composite films: Structure–property relationships, thermal stability and degradation
Nabiyev A.A. Mustafayev I.I. Mehdiyeva R.N. Nuriyev M.A. Andreev E.V. Ponomareva O.Y. Azhibekov A.K. Doroshkevich A.S. Elmekawy A.H.A. Mirzayev M.N. Kuklin A.I.
10 October 2025John Wiley and Sons Inc
Polymer Composites
2025#46Issue S3S44 - S62 pp.
This paper presents the findings of a study on the effects of gamma radiation on the structural and thermal characteristics of high-density polyethylene nanocomposite films. These thin films consist of a combination of HDPE and nano-SiO2 particles prepared by hydrostatic thermal pressing a mixture of HDPE powder and nano-SiO2 in various volume concentrations (ω = 1%, 5%, 10%, and 20%). Fourier transform infrared spectroscopy analysis is used to identify new functional groups on the surface of composite materials that have been irradiated. The effect of the absorbed dose on the physical and chemical changes in the molecular structure of the polymer matrix is investigated. The paper also presents how the absorbed dose affects variations in the melting and crystallization temperatures, thermal stability, and the degradation mechanism of nanocomposites using differential scanning calorimetry and thermogravimetric analysis. Fourier transform infrared spectroscopy analysis shows that gamma radiation enhances the interfacial interactions between the nanoparticles and the polymer matrix. During the repeated heating process within the temperature range of 25–160°C, the melting temperature of the polymer shifted towards a higher temperature, while for the first and second cooling processes, the crystallization peaks for both unirradiated and irradiated samples overlapped. Highlights: γ-irradiation influences the structural and thermal properties of the HDPE/SiO2. The active surface of nano-SiO2 particles acts as a crystallization center. γ-irradiation reduces the melting and crystallization temperatures. Nano-SiO2 particles improve the thermo-oxidative stability of the HDPE matrix. The degree of oxidation depends on irradiation dose and nano-SiO2 concentration.
functional groups , gamma irradiation , high-density polyethylene , lamellar crystal thickness , oxidation index , SiO2 nanoparticles , thermal degradation
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Ministry of Science and Education Republic of Azerbaijan, Institute of Radiation Problems, Baku, Azerbaijan
International Intergovernmental Organization, Joint Institute for Nuclear Research, Dubna, Russian Federation
Department of Physics and Mathematics, Korkyt Ata Kyzylorda University, Kyzylorda, Kazakhstan
Experimental Nuclear Physics Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt
Cyclotron Facility, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt
Ministry of Science and Education Republic of Azerbaijan
International Intergovernmental Organization
Department of Physics and Mathematics
Experimental Nuclear Physics Department
Cyclotron Facility
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