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Effect of Magnetite Nanoparticles on the Dielectric Properties of Nanocomposites Based on Linear Low-Density Polyethylene

  • PHYSICAL CHEMISTRY OF NANOCLUSTERS AND NANOMATERIALS
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Abstract

The effect magnetite nanoparticles on the dielectric properties of nanocomposites based on linear low-density polyethylene in the 10−2–105 Hz range of frequencies is studied. It is found that the amplitude of the maximum of imaginary part of complex permittivity grows, and the maximum shifts toward higher frequencies upon an increase of the concentration of magnetite nanoparticles. It is established that the temperature dependence of the inverse relaxation time at low temperatures has the Arrhenius form (the activation energy falls from 0.38 to 0.12 eV as the concentration of filler grows). The slope of the dependence in Arrhenius coordinates rises at high temperatures and is virtually independent of the concentration of filler. DSC data show that when the concentration of filler is increased, the degree of crystallinity of nanocomposites falls from 43 to 34%. An interpretation of the results is proposed by assuming the observed temperature dependence is a combination of those for crystalline and amorphous regions, while the activation energy in crystalline regions is higher than in amorphous ones.

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ACKNOWLEDGMENTS

The study was carried out using a USF “Facility for measuring the spectra of electric dipole relaxation and their changes under the influence of light.”

Funding

This work was performed as part of State Tasks 0089-2019-0010 and 0089-2019-0012.

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    G. F. Novikov, E. V. Rabenok & G. I. Dzhardimalieva

  2. Faculty of Fundamental Physical and Chemical Engineering, Moscow State University, 119991, Moscow, Russia

    G. F. Novikov & K. A. Kydralieva

  3. Moscow Aviation Institute (National Research University), 125080, Moscow, Russia

    K. A. Kydralieva & G. I. Dzhardimalieva

Authors
  1. G. F. Novikov
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  2. E. V. Rabenok
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  3. K. A. Kydralieva
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  4. G. I. Dzhardimalieva
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Corresponding author

Correspondence to G. F. Novikov.

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Translated by A. Bannov

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Novikov, G.F., Rabenok, E.V., Kydralieva, K.A. et al. Effect of Magnetite Nanoparticles on the Dielectric Properties of Nanocomposites Based on Linear Low-Density Polyethylene. Russ. J. Phys. Chem. 93, 2424–2428 (2019). https://doi.org/10.1134/S0036024419120227

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  • DOI: https://doi.org/10.1134/S0036024419120227

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