Rheology of (±)-camphor-10-sulfonic acid doped polyaniline-m-cresol conducting gel nanocomposites

Garai, Ashesh ; Nandi, Arun K. (2008) Rheology of (±)-camphor-10-sulfonic acid doped polyaniline-m-cresol conducting gel nanocomposites Journal of Polymer Science Part B: Polymer Physics, 46 (1). pp. 28-40. ISSN 0887-6266

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/polb.21...

Related URL: http://dx.doi.org/10.1002/polb.21339

Abstract

The rheological behavior of polyaniline-(±champhor-10-sulfonic acid)0.5-m-cresol [PANI-CSA0.5-m-cresol] gel nanocomposites (GNCs) with Na-montmorillonite clay (intercalated tactoids) is studied. The shear viscosity exhibits Newtonian behavior for low shear rate (<2 × 10-4 s-1) and power law variation for higher shear rate. The zero shear viscosity (η0) and the characteristic time (η0) increase but the power law index (n) decrease with increase in clay concentration. In the GNCs storage modulus (G') and loss modulus (G") are invariant with frequency in contrast to the pure gel. The G' and G' exhibit the gel behavior of the GNCs up to 105 °C in contrast to the melting for the pure gel at 75.7 °C. The percent increase of G' of GNCs increases dramatically (619% in GNC-5) with increasing clay concentration. The conductivity values are 10.5, 5.65, 5.51, and 4.75 S/cm for pure gel, GNC-1, GNC-3, and GNC-5, respectively, promising their possible use in soft sensing devices.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons, Inc.
Keywords:Clay; Gels; Mechanical Properties; Montmorillonite Clay; Nanocomposites; Rheology; Shear Viscosity; Storage Modulus
ID Code:24112
Deposited On:29 Nov 2010 10:25
Last Modified:08 Jun 2011 06:48

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