Influence of static and cyclic compression on the electrical conductivity of FEF black-loaded rubbers

Hassan, H. H.; Khairy, S. A.; El-Guiziri, S. B.; Nasr, G. M.; Darwish, K. A.; Ateia, Ebtesam E.

doi:10.1007/bf00718944

Cited by 7 publications

(6 citation statements)

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“…Similar results have been obtained elsewhere. [31][32][33][34] Based on the experimental results shown in Table IV and Figures 23 and 24 we can conclude that, at uniaxial compres- sion, conducting channels degradation occurs in the composites because of the appearance of shift deformations in the material mass, which cause mutual translation of filler particles in the polymer matrix (together with segments of macromolecules) in a direction normal to the compression axis. Apparently, such deformations result in rather significant structural changes, which cause restoration of the initial structure and properties of ECPCs to be probable only with durable storage of samples at room temperature (acceleration of restoring processes is observed at increased temperatures).…”

Section: Uniaxial Compressionmentioning

confidence: 98%

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

Aneli

Заиков

Khananashvili

1999

J. Appl. Polym. Sci.

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Structural changes proceeding in composites under the effect of various mechanical deformations (stretching, compression, shear, etc.) affect the structure of an electrical conducting system. Mechanical stresses, induced by deformation of composite materials during deformation, affect both the molecular and supermolecular structure of polymers. As a consequence, they also affect a substructure bound to it and composed of filler particles. It is evident that in the case of conducting polymer composites, mechanical deformations should reflect electric conductivity of materials. Key words: mechanical deformations; macromolecules; electric conductivity; polymers ELECTRIC CONDUCTIVITY OF CARBON BLACK-FILLED RUBBERS UNDER STRETCHING DEFORMATIONSMechanical deformations that initiate intertransformations of macromolecules can affect the topology of conducting particles interacting with macromolecules. Many works have studied connections between structural features of composites and their electric conductivity at deformation.

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Section: Uniaxial Compressionmentioning

confidence: 98%

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

Aneli

Заиков

Khananashvili

1999

J. Appl. Polym. Sci.

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“…8 Test samples were in the form of sheets of about 3 cm in length, 0.3 cm in width, and 0.2 cm in thickness. For experimental measurements, the specimen was clamped at both ends in a constant deformation fatigue tester.…”

Section: Temperature Change Measurementmentioning

confidence: 99%

“…One of the most recent uses of the material is for improved aging rocket 1 insulator compounds, filled with cork, asbestos fiber, and iron oxide. The basic structure of EPDM is represented by the following schematic configuration Test samples (EH 4 , EH 6 , EH 8 , and EH 10 ) were obtained by introducing different concentrations of carbon black HAF (high-abrasion furnace black) in ethylene propylene diene polymer.…”

Section: Introductionmentioning

confidence: 99%

Effect of swelling process on the thermoelastic temperature change of ethylene propylene diene rubber filled with carbon black

Ateia

Khairy

Sharra

1999

J. Appl. Polym. Sci.

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ABSTRACT:The effects of both dynamic cyclic extension and swelling on the thermoelastic behavior of ethylene propylene diene rubber loaded with different concentrations of carbon black have been studied. As the strain amplitude increases, the concentration of the ruptured bonds increases, leading to more enhanced friction between particles and consequently to the observed rise in temperature. Temperature change was found to be highly dependent on the swelling and also on carbon black concentration.

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“…The dramatic increase in properties like modulus, hardness and conductance that appears when CB is added to rubber has attracted many workers for the reason of this reinforcement. [5][6][7][8] Electrical properties of a composite system consisting of conducting particles embedded in insulating matrix have been extensively studied before. [9][10][11][12] Cross-linked polymers brought in contact with different solvents during service applications usually exhibit a phenomenon known as swelling.…”

Section: Introductionmentioning

confidence: 99%

Electrical properties of conductive rubber blends subjected to solvent penetration

Shokr

2012

Plastics, Rubber and Composites

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The influence of solvent uptake (%) on the electrical resistivity S of ethylene propylene diene monomer rubber (EPDM)/acrylonitrile butadiene rubber (NBR) blends filled with different concentrations of high abrasion furnace carbon black has been studied. The effects of the EPDM/NBR weight ratio and carbon black content on the room temperature resistivity of the composites were elucidated in detail. The performance of these sensors depends on a number of parameters, including the geometry and concentration of the conductive component dispersed in the polymer. Direct current current-voltage I-V characteristics of the filled rubber blends were studied at room temperature. The current-voltage relationship can be expressed as I5AV B , where A and B are constants that show capability and property of electrical conduction respectively. The I-V curve can be divided into ohmic and non-ohmic regions. A number of important parameters, namely, Schottky and Poole-Frenkel effects, have been determined.

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Influence of static and cyclic compression on the electrical conductivity of FEF black-loaded rubbers

Cited by 7 publications

References 0 publications

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

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

Effect of swelling process on the thermoelastic temperature change of ethylene propylene diene rubber filled with carbon black

Electrical properties of conductive rubber blends subjected to solvent penetration

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