Strongly Non‐linear Carbon Nanofibre Influence on Electrical Properties of Polymer Composites

Relationship between Polymer Dielectric Constant and Percolation Threshold in Conductive Poly(styrene)‐Type Polymer and Carbon Black Composites

“…), geometry and size, surface functionalization, and so forth [5]. The main problem during the construction of the conductive network when carbonaceous particles are used, such as carbon black [6], graphite [7,13,14], fibers [15,16], or carbon nanotubes (NTC) [17,18], is the van der Waals interactions among carbon particles in the macroscopic agglomerates, which has a crucial effect for obtaining an optimal dispersion of them into the polymer matrix and in turn in the percolation threshold. Then, the compatibility is related to composition and surface chemistry [19]; geometry: a high aspect ratio of the conductive particles allows reaching lower percolation concentrations [14,20]; structure [10,[21][22][23]: a higher structure of the primary aggregates of elementary carbon particles reduces percolation threshold due to a better electric path interconnection at microscopic level [10]; surface area [22,23]: surface functionalization of the NTC [24][25][26][27][28], graphite [14,29], and CB particles [22] has been used to enhance the dispersion and compatibility with polymer matrixes.…”