Electrical conductivity properties of expanded graphite–polycarbonatediol polyurethane composites

Belen Redondo‐Foj; Pilar Ortiz‐Serna; Marta Carsí; María Jesús Sanchis; Mario Culebras; Clara María Gómez; Andrés Cantarero

doi:10.1002/pi.4788

journal article Aug 26, 2014

Electrical conductivity properties of expanded graphite–polycarbonatediol polyurethane composites

Belen Redondo‐Foj Pilar Ortiz‐Serna Marta Carsí María Jesús Sanchis Mario Culebras

Clara María Gómez Andrés Cantarero

Polymer International Vol. 64 No. 2 pp. 284-292 · Wiley

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Abstract

AbstractConductive polymer composites of segmented polycarbonatediol polyurethane and expanded graphite (EG) have been synthesized with different amounts of EG conductive filler (from 0 to 50 wt%). SEM, X‐ray diffraction measurements, Fourier transform infrared and Raman spectroscopies demonstrated a homogeneous dispersion of the EG filler in the matrix. The dielectric permittivity of the composites showed an insulator to conductor percolation transition with increase in EG content. Significant changes in the dielectric permittivity take place when the weight fraction of EG is in the range 20–30 wt%. Special attention has been paid to the dependence of the conductivity on frequency, temperature and EG content. The addition of EG to the matrix causes a dramatic increase in the electrical conductivity of 10 orders of magnitude, which is an indication of percolative behavior. A percolation threshold of ca 30 wt% was evaluated by using the scaling law of percolation theory. © 2014 Society of Chemical Industry

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Details

Published: Aug 26, 2014
Vol/Issue: 64(2)
Pages: 284-292
License: View

Authors

B

Belen Redondo‐Foj

Departamento de Termodinámica Aplicada Instituto de Tecnología Eléctrica Universitat Politècnica de Valencia Camino de Vera s/n 46022 Valencia Spain

P

Pilar Ortiz‐Serna

Departamento de Termodinámica Aplicada Instituto de Tecnología Eléctrica Universitat Politècnica de Valencia Camino de Vera s/n 46022 Valencia Spain

M

Marta Carsí

Departamento de Termodinámica Aplicada Instituto de Tecnología Eléctrica Universitat Politècnica de Valencia Camino de Vera s/n 46022 Valencia Spain

M

María Jesús Sanchis

Departamento de Termodinámica Aplicada Instituto de Tecnología Eléctrica Universitat Politècnica de Valencia Camino de Vera s/n 46022 Valencia Spain

M

Mario Culebras

Materials Science Institute University of Valencia PO Box 22085 46071 Valencia Spain

C

Clara María Gómez

Materials Science Institute University of Valencia PO Box 22085 46071 Valencia Spain

A

Andrés Cantarero

Materials Science Institute University of Valencia PO Box 22085 46071 Valencia Spain

Funding

DGCYT Award: MAT2012-33483

Cite This Article

Belen Redondo‐Foj, Pilar Ortiz‐Serna, Marta Carsí, et al. (2014). Electrical conductivity properties of expanded graphite–polycarbonatediol polyurethane composites. Polymer International, 64(2), 284-292. https://doi.org/10.1002/pi.4788

Electrical conductivity properties of expanded graphite–polycarbonatediol polyurethane composites

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