Electrically Conductive Polymeric Composites and Nanocomposites

Krupa, Igor; Prokeš, Ján; Křivka, Ivo; Špitalský, Zdeno

doi:10.1002/9781119972020.ch11

Cited by 9 publications

(15 citation statements)

References 158 publications

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“…At the percolation threshold concentration (5 wt.%), the conductivity sharply increases due to the formation of a continuous conductive path developed in the polymer matrix, and finally, at higher concentrations, the further addition of filler has a marginal effect on the conductivity. The value of percolation threshold is significantly higher than for other polymer composites with graphite nanoplatelets [17,37] but is affected by low interaction between the filler and the polymer matrix caused by microstructure of expanded graphite particles as was observed on WAXS [16].…”

Section: Resultsmentioning

confidence: 80%

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Mechanical and Electrical Properties of Styrene‐Isoprene‐Styrene Copolymer Doped with Expanded Graphite Nanoplatelets

Špitálský

Kratochvíla

Csomorová

et al. 2015

Journal of Nanomaterials

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The molecular dynamics of a triblock copolymer and of expanded graphite nanoplatelets were investigated. Composites were prepared using the solution technique. The effects of filler addition and of filler-matrix interactions were investigated using dielectric relaxation spectroscopy (DRS) and dynamic mechanical analysis (DMA). Only one relaxation was observed by DRS, which was associated with the relaxation of the main polymer chain. Both DRS and DMA demonstrated that the addition of the filler does not cause a significant change in either the temperature of the relaxation or its activation energy, which suggests the presence of weak interactions between the filler and matrix. The storage modulus of the composites increased with increasing filler content. The composite containing 8% filler exhibited a storage modulus increase of approximately 394% in the rubber area. Using the DC electrical conductivity measurements, the electrical percolation threshold was determined to be approximately 5%. The dielectric permittivity and conductivity in the microwave region were determined, confirming that percolating behavior and the critical threshold concentration.

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Section: Resultsmentioning

confidence: 80%

“…Recently, graphene has attracted considerable attention due to its high surface area, low density, and electrical and mechanical properties [1][2][3][4][5][6][7]. The incorporation of graphene particles into polymer matrices promises to produce composites that possess unusual properties [8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Electrical Properties of Styrene‐Isoprene‐Styrene Copolymer Doped with Expanded Graphite Nanoplatelets

Špitálský

Kratochvíla

Csomorová

et al. 2015

Journal of Nanomaterials

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“…This concentration region is characterized by the steep increase of conductivity when an infinite conductive path is formed. According to this theory, the change in conductivity with increasing concentration of conductive filler in the matrix is described by the following relation [3,4]:…”

Section: Introductionmentioning

confidence: 99%

“…in energy, automotive, electronic, or medical sectors. CPC commonly consist of a polymer matrix filled with conductive filler . Electrical conductivity of CPCs depends on the intrinsic conductivity of filler, concentration, size, and shape of particles, as well as on homogeneity of particle distribution in polymer matrix .…”

Section: Introductionmentioning

confidence: 99%

“…Electrical conductivity of CPCs depends on the intrinsic conductivity of filler, concentration, size, and shape of particles, as well as on homogeneity of particle distribution in polymer matrix . The percolation theory is the main tool to describe metal–insulator transition in CPC . The main parameter of the percolation theory is the percolation threshold.…”

Section: Introductionmentioning

confidence: 99%

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Electrical conductivity of epoxy/silicone/carbon black composites: Effect of composite microstructure

et al. 2014

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The objective of this work is to study the effect of electrical conductivity and physical-mechanical properties of carbon black (CB) filled polymer composites. This goal is achieved by synthesizing epoxy/silicon phase separated blend structure of composites filled with CB. The percolation threshold of epoxy/silicone/CB composites decreased and the total conductivity increased compared to the pure epoxy/CB composite. A threefold increase was obtained with tensile strength of epoxy/ silicone/CB composite with 25 wt% of silicone and 5 wt% of CB in comparison with epoxy/CB systems. This composite has conductivity of about 10 26 S/cm, which is six orders of magnitude higher than for epoxy/CB composites at the same concentration of CB. POLYM. COMPOS., 35:2234COMPOS., 35: -2240COMPOS., 35: , 2014. V C 2014 Society of Plastics Engineers Correspondence to: M. Pel ı skov a;

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Development of heating elements based on conductive polymer composites for electrofusion welding of plastics

Kolisnyk

Korab

Iurzhenko

et al. 2020

J of Applied Polymer Sci

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Conductive polymer composites have been developed based on high‐density polyethylene filled with carbon black (HDPE‐CB), capable of generating heat when an electric voltage is applied. For each voltage value, the composite reached a constant value of equilibrium temperature, which obeyed a quadratic dependence on voltage and a linear dependence on electric power. The possibility of using such composites as heating elements (HE) for electrofusion welding of polyethylene adherents was evaluated in two modes, ''hard'', when high voltage was applied for a short welding time, and ''soft'', in which a stepwise regime of the applied voltage and a longer welding time were used. The latter provided a stronger welded joint. Using HE based on the HDPE‐CB composites for welding of butt and lap joints of the polymer materials enabled to obtain welded joints with high strength.

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Electrically Conductive Polymeric Composites and Nanocomposites

Cited by 9 publications

References 158 publications

Mechanical and Electrical Properties of Styrene‐Isoprene‐Styrene Copolymer Doped with Expanded Graphite Nanoplatelets

Mechanical and Electrical Properties of Styrene‐Isoprene‐Styrene Copolymer Doped with Expanded Graphite Nanoplatelets

Electrical conductivity of epoxy/silicone/carbon black composites: Effect of composite microstructure

Development of heating elements based on conductive polymer composites for electrofusion welding of plastics

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