Abstract
Composites that incorporate an electrically conducting filler, the hydrochloric polyaniline (PANI-Cl), into hydroxy-terminated polydimethylsiloxane (HO-PDMS) matrix were evaluated for DC electrical, mechanical, thermal, morphological and piezo-resistive properties. The main focus of the study was on the electrical-mechanical behavior of these composites in view of possible piezo-resistive sensor application. The percolation threshold of conductivity was determined to be around 11.5 wt% of PANI-Cl. Compression/expansion cyclic experiments showed that the filler content modified the stiffness, the magnitude of Mullins effect and the hysteresis behavior in elastomeric composites. The piezo-resistive response of composites differed depending on the sample composition and also, on the strain rate. Composites with concentration above the percolation threshold exhibited at least three-order change of its electrical resistance in a narrow interval of maximum 2% of deformation. The piezo-resistive sensitivity and the reproducibility of
Original language | English |
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Pages (from-to) | 1794-1802 |
Number of pages | 9 |
Journal | Journal of Materials Science |
Volume | 47 |
Issue number | 4 |
DOIs | |
State | Published - Feb 2012 |
Bibliographical note
Funding Information:Acknowledgements T. del Castillo Castro thanks the financial support from the ‘‘Programa de Apoyo Complementario para la Consolidación Institucional de Grupos de Investigación’’ of ‘‘Consejo Nacional de Ciencia y Tecnología’’, Mexico. The authors also wish to thank Silva Burruel and Silvia Andrade for the SEM images.