Instituto de Macromoléculas, Universidade Federal do Rio de Janeiro, Rio de Janeiro,Brazil

Thermoplastic Elastomer Vulcanizates, TPVs, are materials, which have properties as good or even, in some cases, better than those of elastomeric block copolymers. They can be prepared by dynamic vulcanization. This process consists of vulcanizing rubber during its melt-mixing with molten plastic. These materials show conventional elastomers behaviour at low temperatures and the processability of thermoplastics at high temperatures. Since they do not need to be vulcanised during fabrication into end-use pats, they offer a substantial economic advantage. In addition, these materials can be readily reground and recycled [1]. Among the several conventional conductive loads, the polyaniline possess great prominence. The polyaniline used as an intrinsic conducting polymer is based on its high conductivity, synthesis easiness, and stability to the heat and the air. Another advantage is the low production cost [2]. Mechanicals sensors are device that detect force, deformation and / or acceleration. In these materials, it takes place a decrease of the electric resistance as the force applied perpendicularly in its surface increase [3]. The composites were prepared in an internal camera mixer Haake Rheocord 9000 with Roller rotors at 60 rpm speed. The blending time for all of the samples was 8 minutes. They were prepared from a NBR and EVA based TPV with Pani containing 1, 2.5, 5, 10 and 15 % of this load. Electric volumetric resistivity tests were performed. For this test, the mixtures will be injection molded in disks with 38mm of diameter and 2mm of thickness. Th