Effects of mechanical deformations on the structurization and electric conductivity of electric conducting polymer composites

Aneli, Jimsher; Заиков, Г. Е.; Khananashvili, L. M.

doi:10.1002/(sici)1097-4628(19991017)74:3<601::aid-app14>3.0.co;2-k

Cited by 84 publications

(54 citation statements)

References 13 publications

(22 reference statements)

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“…Irreversible change in the electrical resistance at deformation by stretch or pressure has been found in the case of micro-size particles of good conductors as well as low structure carbon black (LSCB) [2][3][4].…”

Section: Introductionsupporting

confidence: 72%

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Polyisoprene/Nanostructured Carbon Composites for Applications in Temperature Sensors

Knite

Zīke

Zavickis

et al. 2013

Material Science and Applied Chemistry

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Abstract. The studies of electrical properties of the polyisoprene (PI) matrix/high structure carbon black (HSCB) composites (PCBC) with various concentrations (8, 9, 10 and 11 mass parts) of filler have been carried out in the temperature interval of 90K-330K. In this paper we focus on the investigation of direct current (DC) conductivity in a low-temperature region with negative temperature coefficient of resistivity (NTCR). It has been proven that variable range hopping (VRH) conduction is dominated by hopping of carriers among localized states in a low-temperature range. At higher temperatures the nearest neighbour hopping (NNH) conductivity or constant range hopping charge transport takes place. The reversibility as well as small hysteresis of resistance change versus temperature indicates prospective temperature sensor application for PCBC.

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Section: Introductionsupporting

confidence: 72%

“…The electrical resistance of PCFC is sensitive to various external force parameters [1][2][3][4][5][6], such as pressure, deformation, gaseous environment and temperature. The above-mentioned polymer composites promise to replace conventional rigid inorganic sensors in certain applications due to their flexibility and ease of processing.…”

Section: Introductionmentioning

confidence: 99%

Polyisoprene/Nanostructured Carbon Composites for Applications in Temperature Sensors

Knite

Zīke

Zavickis

et al. 2013

Material Science and Applied Chemistry

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“…[13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] Many experimental works have been reported concerning the effect of mechanical stress on G ͑Refs. 9, 19, and 28-39͒ and the ac-impedance of composites, [38][39][40][41][42] but the systematic theoretical investigation of the dependence of G with the external applied stress has been initiated in a few relevant works in recent years. [13][14][15][16][17]20,21,24 The main experimental features commonly observed in pressure sensors based on elastomer composites are high sensitivity at low applied stress, currently with exponential rise of G as function of the applied pressure, followed by saturation.…”

Section: Introductionmentioning

confidence: 99%

A model for the dependence of the electrical conductance with the applied stress in insulating-conducting composites

Negri

Rodríguez

Bernik

et al. 2010

Journal of Applied Physics

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A model for the dependence of the electrical conductance, G, with the strain induced by external mechanical stress in conducting particles-polymer composites is presented. The model assumes that the percolation probability between neighboring particles must depart from a scale-invariant behavior but saturate at moderated-high strains, reaching percolation path's saturation, with sigmoid dependence. This dependence is obtained by proposing a dynamic picture where contacts or bonds between neighboring particles are created but also destructed when a stress is applied and relatively moderated or high strains, , are produced in the composite. The electrical conductance of prepared graphite-polydimethylsiloxane composites were measured as function of the applied pressure and fitted by the presented model. The elastic response to the uniaxial compression was studied using a texture analyzer. The possibility of nonuniversal effects in the conduction critical exponent, t, was taken into account. It is concluded that the saturation of the response in the G versus plots cannot be assigned to nonuniversal behavior of the exponent t, or to saturation of the elastic response. On the other hand, the presented model accounts for all the main experimental features observed in these systems and for previously reported data of elastomer composites. The simulated behavior of the piezoresistivity coefficient is also in qualitative agreement with previous reports.

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“…The filler concentration at which the electrical conductivity of a composite would drastically change due to a tensile strain corresponds to the upper bound of the percolation region (transition from Stage III to Stage IV) and is called the critical (target) concentration. This strain-induced change in the electrical conductivity is referred to as tensoresistivity and is represented by the gauge factor, which is defined as the relative change in a specimen's electrical resistance per unit strain, e, as [15]:…”

Section: Conductive Nanocompositesmentioning

confidence: 99%

Sensor-Enabled Geogrids for Stabilization and Performance Monitoring of Earth Structures: State of Development

Yazdani

Hatami

2016

Int. J. of Geosynth. and Ground Eng.

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The sensor-enabled geogrid (SEGG) technology has been introduced and developed by the authors in the past few years as a new category of geogrid products that possess built-in strain-sensing capability in addition to their conventional reinforcement/stabilization function in geotechnical and transportation applications. The SEGG strain-sensing function arises from their tensoresistivity, which is the sensitivity of their electrical conductivity to tensile strain. This paper reports the state of development of the SEGG technology and reports latest findings on both the in-isolation and in-soil tensoresistivity performance of SEGG specimens. Results indicate that the technology holds promise to serve as an alternative to conventional instrumentation for the performance monitoring of geotechnical structures.

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Effects of mechanical deformations on the structurization and electric conductivity of electric conducting polymer composites

Cited by 84 publications

References 13 publications

Polyisoprene/Nanostructured Carbon Composites for Applications in Temperature Sensors

Polyisoprene/Nanostructured Carbon Composites for Applications in Temperature Sensors

A model for the dependence of the electrical conductance with the applied stress in insulating-conducting composites

Sensor-Enabled Geogrids for Stabilization and Performance Monitoring of Earth Structures: State of Development

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