Abstract
The electrical properties of polymer nanocomposites based on dielectric polymer matrices of different types and electrically conductive polymer fillers – polyortotoluidine, polyorthoanisidine and polyaniline have been studied. It is shown that the concentration dependence of the specific conductivity on the content of fillers has a percolation character with a low “percolation threshold”, which depends on the nature of the polymer matrix and polyaminoarene and is 1.7-10.0 vol.%. The calculated critical parameters of electroconductivity are characteristic of the formation of an infinite 3-dimensional cluster of conductivity and indicate a significant influence of the nature of the components and morphology of the material on the charge transfer processes in such systems.
Highlights
The electrical conductivity of polymer-polymer composites with the same filling depends on the particle size, the homogeneity of the distribution of the conductive filler in the polymer matrix, the nature of the interaction of the components of the conductive and nonconductive phases [15, 24]
The filling of the polymeric binder with a conductive highly dispersed filler determines the percolation dependence of the conductivity on the volume content of the filler. Such low values of the percolation threshold are characteristic of composites with a conductive polymer phase [13]
It can be assumed that the electrically conductive filler forms its own polymer network inside the host polymer and a continuous conductive polymer phase is formed, which is evenly distributed throughout the volume of the polymer composite [7, 25, 26]
Summary
The electrical properties of polymer nanocomposites based on dielectric polymer matrices of different types and electrically conductive polymer fillers – polyortotoluidine, polyorthoanisidine and polyaniline have been studied. It is shown that the concentration dependence of the specific conductivity on the content of fillers has a percolation character with a low “percolation threshold”, which depends on the nature of the polymer matrix and polyaminoarene and is 1.7-10.0 vol.%. The calculated critical parameters of electroconductivity are characteristic of the formation of an infinite 3-dimensional cluster of conductivity and indicate a significant influence of the nature of the components and morphology of the material on the charge transfer processes in such systems. Received 17 November 2021; Accepted 28 December 2021
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