Abstract
Conductive composites were prepared using dodecylbenzenesulfonic acid (DBSA) doped polyaniline (PANT) as the conducting material. The matrix was an epoxy resin blend (EP). The microstructure and, the electrical, dielectric and mechanical properties of materials containing different amounts of PANT-DBSA are reported. The surface resistivity of the samples decreased smoothly with the addition of PANT-DBSA, reaching a value of 10 exp 6 Ohms for 18.4 ww. % of PANI-DBSA. The dielectric constant was also influenced by the PANT-DBSA concentration in the EP matrix, as it was increasing gradually with the increase of the conductive salt content. Studies of the microstructure and the conductive network formation carried out with scanning electron microscopy, showed that PANT-DBSA can create an immiscible blend with the EP matrix. Finally, it was found out that the addition PANT-DBSA has a negative influence on the flexural properties of the composites.