Electrical properties of carbon black-epoxy resin heterogeneous materials near the percolation threshold

1998 ◽  
Vol 23 (1-2) ◽  
pp. 315-318 ◽  
Author(s):  
K BENABOUD ◽  
M ACHOUR ◽  
F CARMONA ◽  
L SALOME
Keyword(s):  
Electrical Properties ◽  
Carbon Black ◽  
Percolation Threshold ◽  
Epoxy Resin ◽  
Heterogeneous Materials

scholarly journals Development of Coffee Biochar Filler for the Production of Electrical Conductive Reinforced Plastic

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1916 ◽  
Author(s):  
Mauro Giorcelli ◽  
Mattia Bartoli
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Electrical Properties ◽  
Carbon Black ◽  
Epoxy Resin ◽  
Resin Composites ◽  
Powder Form ◽  
Coffee Waste ◽  
Reinforced Plastic ◽  
Epoxy Resin Composites

In this work we focused our attention on an innovative use of food residual biomasses. In particular, we produced biochar from coffee waste and used it as filler in epoxy resin composites with the aim to increase their electrical properties. Electrical conductivity was studied for the biochar and biochar-based composite in function of pressure applied. The results obtained were compared with carbon black and carbon black composites. We demonstrated that, even if the coffee biochar had less conductivity compared with carbon black in powder form, it created composites with better conductivity in comparison with carbon black composites. In addition, composite mechanical properties were tested and they generally improved with respect to neat epoxy resin.

The Electrical Properties of Epoxy Resin Composites Filled with Cnts and Carbon Black

2011 ◽  
Vol 11 (10) ◽  
pp. 9110-9117 ◽  
Author(s):  
S. Bellucci ◽  
L. Coderoni ◽  
F. Micciulla ◽  
G. Rinaldi ◽  
I. Sacco
Keyword(s):  
Electrical Properties ◽  
Carbon Black ◽  
Epoxy Resin ◽  
Resin Composites ◽  
Epoxy Resin Composites

scholarly journals Electrical properties of epoxy composites based on carbon black

2021 ◽  
Vol 340 ◽  
pp. 01052
Author(s):  
Artyom A. Shestakov ◽  
Nikita I. Lapekin ◽  
Andrey E. Brester ◽  
Evgenii A. Maksimovskii ◽  
Arina V. Ukhina ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Carbon Black ◽  
Percolation Threshold ◽  
Epoxy Composites ◽  
Frequency Range ◽  
Maximum Value ◽  
Ac Electrical Properties

In this work, AC electrical properties of epoxy composites based on carbon black (CB) were determined depending on the loading of filler. The measurements were carried out within a frequency range 20 Hz – 1 MHz. The loading of carbon black was 0–5 wt.% in composites. The conductivity increased when increasing the content of carbon black and the maximum values were observed at 5 wt.% CB. The maximum value of permittivity was at 0.75 wt.% CB and it can be considered as percolation threshold.

scholarly journals Thermal/Electrical Properties and Texture of Carbon Black PC Polymer Composites near the Electrical Percolation Threshold

2021 ◽  
Vol 5 (8) ◽  
pp. 212
Author(s):  
Valentina Brunella ◽  
Beatrice Gaia Rossatto ◽  
Chiara Mastropasqua ◽  
Federico Cesano ◽  
Domenica Scarano
Keyword(s):  
Electrical Properties ◽  
Carbon Black ◽  
Percolation Threshold ◽  
Textural Properties ◽  
Thermoplastic Polymer ◽  
Conductivity Measurements ◽  
Scanning Calorimetry ◽  
Electrical Percolation ◽  
Electrical Percolation Threshold ◽  
Dc Electrical Properties

Polycarbonate (PC), a thermoplastic polymer with excellent properties, is used in many advanced technological applications. When PC is blended with other polymers or additives, new properties, such as electrical properties, can be available. In this study, carbon black (CB) was melt-compounded with PC to produce polymer compounds with compositions (10–16 wt.% of CB), which are close to or above the electrical percolation threshold (13.5–14 wt.% of CB). Effects due to nanofiller dispersion/aggregation in the polymer matrix, together with phase composition, glass transition temperature, morphology and textural properties, were studied by using thermal analysis methods (thermogravimetry and differential scanning calorimetry) and scanning electron microscopy. The DC electrical properties of these materials were also investigated by means of electrical conductivity measurements and correlated with the “structure” of the CB, to better explain the behaviour of the composites close to the percolation threshold.

Carbon Black Selective Dispersion and Electrical Properties of Epoxy Resin/Polystyrene/Carbon Black Ternary Composites

2012 ◽  
Vol 548 ◽  
pp. 94-98 ◽  
Author(s):  
Chuan Guo Ma ◽  
Ming Liu
Keyword(s):  
Dielectric Properties ◽  
Electrical Properties ◽  
Carbon Black ◽  
Polymer Blends ◽  
Epoxy Resin ◽  
Phase Structure ◽  
Continuous Phase ◽  
Phase Structures ◽  
Thermosetting Polymer ◽  
Conductive Properties

Carbon black (CB) selective dispersion and conductive properties of immiscible thermoplastic/thermosetting polymer blends consisting of polystyrene (PS) and epoxy resin (EP) were investigated in this paper. The results showed that CB particles are preferentially localized in EP phase in PS/EP blends. The blend with 10 pbw (parts by weight) PS presented an EP continuous phase structure, and both blends with 20 pbw and 30 pbw developed into a bi-continuous phase structure. The selective dispersion of CB particles was explained by thermodynamic parameters. The phase structures of blends have important influences on both conductive and dielectric properties. The blends with 10 pbw PS has a very low percolation threshold nearly 0.25wt%.

Epoxy Resin/Carbon Black Composites Below the Percolation Threshold

2013 ◽  
Vol 13 (8) ◽  
pp. 5434-5439 ◽  
Author(s):  
J. Macutkevic ◽  
P. Kuzhir ◽  
A. Paddubskaya ◽  
S. Maksimenko ◽  
J. Banys ◽  
...  
Keyword(s):  
Carbon Black ◽  
Percolation Threshold ◽  
Epoxy Resin

Electrical Conductivity of Thermo-Oxidatively-Degraded EPDM Rubber

1992 ◽  
Vol 65 (2) ◽  
pp. 315-328 ◽  
Author(s):  
Bengt Mattson ◽  
Bengt Stenberg
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Carbon Black ◽  
Percolation Threshold ◽  
Oxidative Degradation ◽  
Dc Conductivity ◽  
Carbonyl Groups ◽  
Epdm Rubber ◽  
Polar Groups

Abstract Oxidative degradation of rubbers, and the development of oxidized layers at the surfaces, results in increased electrical conductivity. This paper shows that for EPDM rubbers heavily oxidized at 200° C, the DC-conductivity increases more than two orders of magnitude, and the percolation threshold for DC conductivity is decreased below 5 phr carbon black. The effect of oxidation upon the electrical properties is explained as being due to the presence of polar groups, e.g., carbonyl groups, in between the carbon-black agglomerates which provide shorter distances for the electrons to tunnel through.

Surface and electrical properties of high density polyethylene + carbon black composites near the percolation threshold

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Enrique Vigueras-Santiago ◽  
Susana Hernández-López ◽  
Witold Brostow ◽  
Oscar Olea-Mejia ◽  
Omar Lara-Sanjuan
Keyword(s):  
Electrical Resistivity ◽  
Electrical Properties ◽  
Carbon Black ◽  
Percolation Threshold ◽  
High Density Polyethylene ◽  
Scratch Resistance ◽  
Electric Resistivity ◽  
High Density ◽  
Dynamic Friction ◽  
Scratch Testing

AbstractWe have studied friction, scratch resistance and electrical resistivity in high density polyethylene (HDPE) + carbon black (CB) composites in relation to electric resistivity percolation threshold. Below the threshold, CB addition lowers dynamic friction by providing a smaller surface area of contact of the composites with the pin surface; the effect is stronger at higher loads. Above the percolation concentration, an increase in friction is seen due to formation of CB agglomerates and thus an increase in the area of contact. The recovery depth in scratch testing behaves similarly as dynamic friction and for the same reasons, particularly so at high loads, with a minimum at the percolation threshold. Thus, at the threshold we have simultaneously superior scratch resistance, low dynamic friction and low electric resistivity.

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