Antistatic coating and electromagnetic shielding properties of a hybrid material based on polyaniline/organoclay nanocomposite and EPDM rubber

• Published in: Synthetic metals Vol. 156; no. 18; pp. 1249 - 1255
• Main Authors: Soto-Oviedo, Mauro A., Araújo, Olacir A., Faez, Roselena, Rezende, Mirabel C., De Paoli, Marco-A.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.11.2006; Amsterdam Elsevier Science; New York, NY
• Subjects: Applied sciences; Composites; EMI shielding; EPDM; Exact sciences and technology; Forms of application and semi-finished materials; Nanocomposite; Organoclay; Polyaniline; Polymer industry, paints, wood; Technology of polymers; Nanocomposite; EPDM; Polyaniline; Organoclay; EMI shielding; Electrical conductivity; Composition effect; Antistatic agent; Electromagnetic shielding; Thermal stability; Electromagnetic wave reflection; Aniline polymer; Organic clay; Coating material; Polymer blends; Electrical properties; Mechanical properties; Tensile property; Experimental study; Sulfonic acid; Conducting polymers; EPDM rubber; Dynamic mechanical properties; Morphology; Bentonite; Doped polymer
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/j.synthmet.2006.09.003

Thermal, mechanical, electrical and microwave radiation absorbing properties of conductive composites based on dodecylbenzenesulfonate doped polyaniline/organoclay nanocomposites and propylene–ethylidene–norbornene rubber have been investigated with special interest on the effect of the nanocomposite concentration. Composites were prepared by melt blending using an internal mixer. Morphology studies by scanning electron microscopy of cryofractured surfaces indicated that the conducting nanocomposites produced heterogeneously distributed aggregates in the continuous elastomeric matrix. The composites exhibit high conductivities, up to 10 −3 S cm −1 for 40 wt.% of conducting nanocomposite, and good mechanical properties. They also present high microwave attenuation values, in the frequency range of 8–12 GHz. This property depends on the concentration of the conductive nanocomposite and on the film thickness. The composites can be used for antistatic coatings or for electromagnetic shielding.