Abstract
UHMWPE/SiO2 composites were obtained from a homogeneous mixture of ultrahigh-molecular- weight polyethylene (UHMWPE) and silicon dioxide (α-SiO2) by hot pressing. The temperature dependence (20–170°C) of their conductivities σdс prior to and after γ irradiation (D = 200 kGy), the effect of absorbed dose on the σdс value (dose dependence), the behavior of the function logσdc = f(T) under heating–cooling conditions, and the frequency dependences (25–106 Hz) of the real (ε') and imaginary (ε'') parts of the complex dielectric constant were studied. The logσdc = f(T) dependence was shown to have in both cases a complex pattern: “breaks” due to phase transitions were observed. With an increase in the concentration of α-SiO2, the ε' and ε'' (tanδ) values in the matrix increased and the frequency dependences of these values corresponded to an exponential rule.
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Original Russian Text © R.S. Ismaiilova, A.M. Magerramov, M.M. Kuliev, G.A. Akhundova, 2017, published in Elektronnaya Obrabotka Materialov, 2017, No. 3, pp. 12–18.
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Ismaiilova, R.S., Magerramov, A.M., Kuliev, M.M. et al. Electrical Conductivity and Dielectric Permittivity of γ-Irradiated Nanocomposites Based on Ultrahigh-Molecular-Weight Polyethylene Filled with α-SiO2. Surf. Engin. Appl.Electrochem. 54, 6–11 (2018). https://doi.org/10.3103/S1068375518010076
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DOI: https://doi.org/10.3103/S1068375518010076