Percolation concept and the electrical conductivity of carbon black-polymer composites 2: Non-crystallisable chloroprene rubber mixed with HAF carbon black

Ali, Mohammed; Abo-Hashem, A.

doi:10.1016/s0924-0136(96)00022-2

Cited by 21 publications

(9 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This value is slightly lower than the usual results obtained for high filler content (>35 wt.−%) based on equivalent CB with different crosslinked matrices (e.g., styrene butadiene rubber [ 17 ], chloroprene rubber [ 18 ], silicone rubber [ 19 ]), or with a thermoplastic matrix (e.g., styrene-ethylene butylene-styrene [ 20 ] or poly(ethylene-co-ethyl acrylate) [ 21 ]). This behaviour might be due to the excluded volume created by the high amount of CaCO 3 (30 wt.−% [ 16 ]) present in our matrix: CB particles are only confined in the polymer matrix and not in the total volume of the CPC.…”

Section: Resultsmentioning

confidence: 61%

A Flexible Strain Sensor Based on a Conductive Polymer Composite for in situ Measurement of Parachute Canopy Deformation

Cochrane

Lewandowski

Končar

2010

Sensors

View full text Add to dashboard Cite

A sensor based on a Conductive Polymer Composite (CPC), fully compatible with a textile substrate and its general properties, has been developed in our laboratory, and its electromechanical characterization is presented herein. In particular the effects of strain rate (from 10 to 1,000 mm/min) and of repeated elongation cycles on the sensor behaviour are investigated. The results show that strain rate seems to have little influence on sensor response. When submitted to repeated tensile cycles, the CPC sensor is able to detect accurately fabric deformations over each whole cycle, taking into account the mechanical behaviour of the textile substrate. Complementary information is given concerning the non-effect of aging on the global resistivity of the CPC sensor. Finally, our sensor was tested on a parachute canopy during a real drop test: the canopy fabric deformation during the critical inflation phase was successfully measured, and was found to be less than 9%.

show abstract

Section: Resultsmentioning

confidence: 61%

A Flexible Strain Sensor Based on a Conductive Polymer Composite for in situ Measurement of Parachute Canopy Deformation

Cochrane

Lewandowski

Končar

2010

Sensors

View full text Add to dashboard Cite

show abstract

“…Non-ohmic I-V behavior of CB-loaded polyvinyl chloride was observed by Sichel et al [8] in 1978 and the phenomenon was explained by thermal breakdown theory. Ohmic I-V behavior of CB-loaded rubber was observed by Ali et al [9][10]. In this paper the ohmic and non-ohmic I-V characteristics of the epoxy resins contained different CB and the mechanism of it are discussed.…”

Section: Introductionmentioning

confidence: 69%

I-V characteristic and mechanism of carbon black filled epoxy resin matrix composites

2007

SPIE Proceedings

View full text Add to dashboard Cite

The I-V characteristic of the epoxy resin matrix composites containing conductive carbon black (CB) and sprayed CB is experimentally studied. The test results indicate that the I-V characteristic of the CB filled epoxy resin matrix composites is affected by the CB diameter. The composites containing sprayed CB with the diameter of 123nm have a linear relation between current and voltage and no variation in resistance post-exposed to an electric field. However, the composites containing conductive CB with the diameter of 33nm have a nonlinear I-V characteristic and the resistance of the composites post-exposed to an electric field decreases dramatically. A DC circuit model based on the experimental research is proposed. The occurrence of the electrical breakdown induces the nonlinear I-V characteristic and the dramatic decrease of the electrical resistance of the composites post-exposed to an electric field.

show abstract

“…Their electrical characteristics are related to the concentration, size, and shape of the particles and also to possible interactions between the conductive and the insulating phases. Though some works are available on electrical properties of CR and conducting carbon black filled composites , the effect of cyclic deformations and temperature on electrical and dynamic mechanical properties of CR composites have not been studied in details in these works of literature.…”

Section: Introductionmentioning

confidence: 99%

Analysis of electrical and dynamic mechanical response of conductive elastomeric composites subjected to cyclic deformations and temperature

2017

View full text Add to dashboard Cite

Effects of different mechanical deformations such as cyclic bending and compressive flexing and temperature on electrical and dynamic mechanical properties of elastomeric composites have been investigated. Conductive elastomeric composites were prepared by incorporating different carbon blacks in an insulating polychloroprene (CR) rubber matrix. The filler loading was varied between 10 and 110 phr (parts per hundred rubber) i/r/o different carbon blacks to assess the percolation threshold of different composites. Due to the spatial arrangement of conductive filler particles at certain critical concentration, some conducting networks are formed leading to abrupt increase in conductivity of polymer composites. This critical concentration is known as percolation threshold. The increase in conductivity well below and above percolation threshold is relatively less compared to that around percolation. The variation of electrical conductivity and dynamic mechanical modulus due to bending and compressive flexing are found to be similar, that is, both characteristics show a drop in magnitude with increase in number of flex cycles. The conductivity of system changes when composites are subjected to changes in temperature. This is mainly due to the destruction of existing conducting networks as well as formation of some new conducting networks. The net change depends on the degree of formation or destruction of networks. It is interesting to see that conductivity does not follow the same path during heating–cooling cycles thereby causing electrical hysteresis. POLYM. COMPOS., 39:3912–3923, 2018. © 2017 Society of Plastics Engineers

show abstract

Percolation concept and the electrical conductivity of carbon black-polymer composites 2: Non-crystallisable chloroprene rubber mixed with HAF carbon black

Cited by 21 publications

References 14 publications

A Flexible Strain Sensor Based on a Conductive Polymer Composite for in situ Measurement of Parachute Canopy Deformation

A Flexible Strain Sensor Based on a Conductive Polymer Composite for in situ Measurement of Parachute Canopy Deformation

I-V characteristic and mechanism of carbon black filled epoxy resin matrix composites

Analysis of electrical and dynamic mechanical response of conductive elastomeric composites subjected to cyclic deformations and temperature

Contact Info

Product

Resources

About