Сonductivity of Composites Based on Low Density Polyethylene with Cu2S Nanoparticles

CZU 537.31; 539.21

DOI  https://doi.org/10.5281/zenodo.1054011

The temperature dependences of the electrical conductivity of nanocomposites based on the low density polyethylene (LDPE) with Cu₂S nanoparticles are investi-gated. The nanocomposites under study were obtained by the uniaxial orientation of the polymer film with further formation of the layered chemisorptions of Cu₂S nanoparticles. It has been shown that the temperature dependence of the resistivity from a certain temperature, obeys the Arrhenius s = s₀ × exp(-E/kT) with several linear sections in lgs = f(10³/T) dependence with different values of the activation energy. The observed dependence lgρ = f(1/T) of LDPE/Cu₂S nanocomposites allows us to say that an increase of temperature is accompanied by increasing mobility of the structural units of the polymer matrix in the volume and surface of the sample. Besides, the existence of nanoparticles in the matrix decreases the mobility of macromolecules by increasing the interaction at the interface of the polymer with the nanoparticle.

Keywords: conductivity, resistivity, polymer, nanocomposite, mobility, interface, infra-red spectroscopy.