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Role of non-linear processes in conducting polymer blends for piezo-sensors: Part 2: Studies on polyaniline/SBS blends

Radhakrishnan, S and Kar, Swarnendu B. (2005) Role of non-linear processes in conducting polymer blends for piezo-sensors: Part 2: Studies on polyaniline/SBS blends. Sensors and Actuators A: Physical, 120 (2). 474 - 481.

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Official URL: http://www.sciencedirect.com/science/article/B6THG...

Abstract

The electrical properties and piezo-response of conducting polymer blends have been investigated with respect to composition for styrene–butadiene–styrene (SBS) elastomer containing two grades of polyaniline (PANI). The blends were synthesized using solution/dispersion technique in which the conducting PANI was prepared with either HCl or dodecyl benzene sulfonic acid (DBSA) as dopant. Thick sheets cast from these exhibited high piezo-sensitive electrical resistance even at small mechanical load. The pressure dependence of resistance followed a non-linear power law of the type R = KP−m where K and m values changed considerably with composition. The current voltage characteristics in these blends were found to be highly non-linear and the conduction mechanism was either space charge limited or tunneling type depending on the concentration and nature of conducting additive. These various results have been explained on the basis of the phenomenological model developed incorporating the non-linear processes for electrical and mechanical properties.

Item Type:Article
Uncontrolled Keywords:Non-linear process; Conducting polymer; Piezo-sensors
Subjects:Analytical Science > Nanotechnology for sensing and actuating
ID Code:4639
Deposited By:SPI
Deposited On:06 Jul 2009 15:16
Last Modified:06 Jul 2009 15:16

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