Electrical conductivity studies for hydrogen-bonded supramolecular polymer formed by dialkylurea in non-polar solvent

• The electrical conductivity of urea-based supramolecular polymers formed in non-polar medium is investigated with the use of the impedance spectroscopy.
• The thermal activation energy of the direct current electrical conductivity is independent of the medium viscosity.
• The correlation between the relaxation times of the charge curriers translation and the dipolar entities rotation is observed.
• The presented data point out for the participation of the protons, releasing in the acts of the hydrogen bonds breaking, in the electrical conductivity of the studied supramolecular system.

The electrical features of the supramolecular hydrogen-bonded polymers formed by N,N′-di(2-ethylhexyl)urea (EHU) in non-polar medium were investigated with the use of the impedance spectroscopy. It was found that the thermal activation energy of the direct current electrical conductivity is independent of the medium viscosity in a large range of EHU mole fraction (0.3 < x ≤ 1), in full analogy to behavior of the activation energy of the dipolar relaxation time of the entities resulting from the thermally stimulating breaking of the hydrogen bonds chains. Besides, in that urea concentration range one observes the correlation between the relaxation times of the charge carriers translation and the dipolar entities rotation. The presented data point out for the participation of the protons, released in the acts of the hydrogen bonds breaking, in the electrical conductivity of the studied supramolecular system.

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