Study of the thermomechanical and electrical properties of conducting composites containing natural rubber and carbon black
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Data
2007-10-15
Autores
Oliveira, Fernando A.
Alves, Neri [UNESP]
Giacometti, Jos A.
Constantino, Carlos J. L.
Mattoso, Luiz H. C.
Man, Ana M. O. A.
Job, Aldo E.
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Editor
Wiley-Blackwell
Resumo
This work describes the preparation and characterization of composite materials obtained by the combination of natural rubber (NR) and carbon black (CB) in different percentages, aiming to improve their mechanical properties, processability, and electrical conductivity, aiming future applications as transducer in pressure sensors. The composites NR/CB were characterized through optical microscopy (OM), DC conductivity, thermal analysis using differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMA), thermogravimetry (TGA), and stress-strain test. The electrical conductivity varied between 10(-9) and 10 S m(-1), depending on the percentage of CB in the composite. Furthermore, a linear (and reversible) dependence of the conductivity on the applied pressure between 0 and 1.6 MPa was observed for the sample with containing 80 wt % of NR and 20% of CB. (C) 2007 Wiley Periodicals, Inc.
Descrição
Palavras-chave
natural rubber, thermal properties, conducting, polymers, composite film, piezoresistive sensor
Como citar
Journal of Applied Polymer Science. Hoboken: John Wiley & Sons Inc., v. 106, n. 2, p. 1001-1006, 2007.