Contribution to the Theoretical Study of Electrical Conductivity of Materials Composites

Abstract

The present work, constituted a theoretical study of the phenomenon of the electric conductivity of composite conducting polymers. Generally, the polymers are used as electrical insulators. The incorporation of conducting loads in an insulating polymeric matrix makes it possible to obtain materials having at the same time a high electric conductivity and a low density. These materials offer a great number of applications such as the electromagnetic shielding, the protection of metals against corrosion, the adhesives conducting, the connectors, the sensors, etc. The prediction and modelling of the electrical behaviour of these composite materials are needed for the choice of their scope and could therefore reduce the onerous experimental work and the cost of production through an optimized design. We carried out a theoretical study. To make this study, we are based on experimental results existing in the specialized literature and we build a new ideal model which describes the variation of electrical conductivity in function the voluminal fraction of the conducting loads. The comparison between our ideal model suggested and other models of McLachlan, Kirkpatrick and Landauer, shows that the model suggested is in concord with the experimental results.