Structure and Electrical Conductivity of Polystyrene/Carbon Black Composites Prepared by Microlayer Coextrusion

Electrically conducting composites with a structure of alternating (A-B-A)n layers were prepared by a novel microlayer coextrusion, which were consisted of alternating layers of polystyrene (PS) and layers of carbon black (CB)-filled polystyrene (PSCB). The co-continuous structure with selective location of CB in PSCB layers was controllable by changing the number of multiplying elements, and decreased the percolation threshold and electrical resistivity of multilayered composites because of the double percolation effect. In addition, the multilayered composites exhibited better mechanical properties than that of the conventional blends, which were related to the layered structure and small size of CB aggregates.

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Selective Localization of Carbon Black in Bio-Based Poly (Lactic Acid)/Recycled High-Density Polyethylene Co-Continuous Blends to Design Electrical Conductive Composites with a Low Percolation Threshold

Polymers ◽

10.3390/polym11101583 ◽

2019 ◽

Vol 11 (10) ◽

pp. 1583 ◽

Cited By ~ 2

Author(s):

Xiang Lu ◽

Benhao Kang ◽

Shengyu Shi

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Electrical Conductivity ◽

Lactic Acid ◽

Carbon Black ◽

Percolation Threshold ◽

High Density Polyethylene ◽

Poly Lactic Acid ◽

Electrically Conductive ◽

Selective Localization

The electrically conductive poly (lactic acid) (PLA)/recycled high-density polyethylene (HDPE)/carbon black (CB) composites with a fine co-continuous micro structure and selective localization of CB in the HDPE component were fabricated by one-step melt processing via a twin-screw extruder. Micromorphology analysis, electrical conductivity, thermal properties, thermal stability, and mechanical properties were investigated. Scanning electron microscope (SEM) images indicate that a co-continuous morphology is formed, and CB is selectively distributed in the HDPE component. With the introduction of CB, the phase size of the PLA component and the HDPE component in PLA/HDPE blends is reduced. In addition, differential scanning calorimetry (DSC) and thermos gravimetric analysis (TGA) results show that the introduction of CB promotes the crystallization behavior of the PLA and HDPE components, respectively, and improves the thermal stability of PLA70/30HDPE/CB composites. The electrically conductive percolation threshold of the PLA70/30HDPE/CB composites is around 5.0 wt %, and the electrical conductivity of PLA70/30HDPE/CB composites reaches 1.0 s/cm and 15 s/cm just at the 10 wt % and 15 wt % CB loading, respectively. Further, the tensile and impact tests show that the PLA70/30HDPE/CB composites have good mechanical properties. The excellent electrical conductivity and good mechanical properties offer the potential to broaden the application of PLA/HDPE/CB composites.

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Electrical conductivity and rheological properties of carbon black based conductive polymer composites prior to and after annealing

Polymers and Polymer Composites ◽

10.1177/09673911211001277 ◽

2021 ◽

pp. 096739112110012

Author(s):

Qingsen Gao ◽

Jingguang Liu ◽

Xianhu Liu

Keyword(s):

Electrical Conductivity ◽

Carbon Black ◽

Percolation Threshold ◽

Rheological Properties ◽

Network Formation ◽

Loss Modulus ◽

Conductive Polymer ◽

Complex Viscosity ◽

Electrical Percolation ◽

Electrical Percolation Threshold

The effect of annealing on the electrical and rheological properties of polymer (poly (methyl methacrylate) (PMMA) and polystyrene (PS)) composites filled with carbon black (CB) was investigated. For a composite with CB content near the electrical percolation threshold, the formation of conductive pathways during annealing has a significant impact on electrical conductivity, complex viscosity, storage modulus and loss modulus. For the annealed samples, a reduction in the electrical and rheological percolation threshold was observed. Moreover, a simple model is proposed to explain these behaviors. This finding emphasizes the differences in network formation with respect to electrical or rheological properties as both properties belong to different physical origins.

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Influence of Carbon Fiber Incorporation on Electrical Conductivity of Cement Composites

Applied Sciences ◽

10.3390/app10248993 ◽

2020 ◽

Vol 10 (24) ◽

pp. 8993

Author(s):

Ilhwan You ◽

Seung-Jung Lee ◽

Goangseup Zi ◽

Daehyun Lim

Keyword(s):

Electrical Conductivity ◽

Electrical Resistivity ◽

Carbon Fiber ◽

Percolation Threshold ◽

Cement Composite ◽

Electrode Spacing ◽

Cement Composites ◽

Different Types ◽

The Difference

This study investigated the effects of carbon fiber (CF) length, electrode spacing, and probe configuration on the electrical conductivity of cement composites. Accordingly, 57 different types of samples were prepared, considering three different CF lengths, five different CF contents, three different electrode spacings, and two different probe configurations. This research found that the influence of CF length on the electrical resistivity of cement composite depends electrode spacing. For the cement composite with wide electrode spacing of 40 mm, its resistivity decreased as increasing CF length as in the previous study. However, when the electrode spacing is 10 mm, which is narrow (10 mm), the resistivity of the cement composite rather increased with increasing CF length. The results implied that when an electrode is designed for the cement composite incorporating CF, the CF length should be short compared to the electrode spacing. The percolation threshold of CF measured by the two-probe configuration was 2% or more. This is higher than that measured by the four-probe configuration (1%). At a lower CF content than 2%, the two-probe configuration gave higher resistivity of the cement composite than the four-probe configuration. However, the difference coming from the different probe configurations was marginal as increasing the CF content.

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

Polymers ◽

10.3390/polym11121916 ◽

2019 ◽

Vol 11 (12) ◽

pp. 1916 ◽

Cited By ~ 13

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.

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The electrical conductivity of ethylene butyl-acrylate/carbon black composites: The effect of foaming on the percolation threshold

Synthetic Metals ◽

10.1016/j.synthmet.2013.12.008 ◽

2014 ◽

Vol 188 ◽

pp. 140-145 ◽

Cited By ~ 10

Author(s):

M. Pelíšková ◽

P. Piyamanocha ◽

J. Prokeš ◽

M. Varga ◽

P. Sáha

Keyword(s):

Electrical Conductivity ◽

Carbon Black ◽

Percolation Threshold ◽

Butyl Acrylate

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Double percolation effect on the electrical conductivity of conductive particles filled polymer blends

Colloid & Polymer Science ◽

10.1007/bf00652179 ◽

1992 ◽

Vol 270 (2) ◽

pp. 134-139 ◽

Cited By ~ 265

Author(s):

M. Sumita ◽

K. Sakata ◽

Y. Hayakawa ◽

S. Asai ◽

K. Miyasaka ◽

...

Keyword(s):

Electrical Conductivity ◽

Polymer Blends ◽

Filled Polymer ◽

Percolation Effect ◽

Double Percolation ◽

Conductive Particles

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Effect of Graphite and Carbon Black Fillers on the Processability, Electrical Conductivity and Mechanical Properties of Polypropylene-Based Bipolar Plates

Polymers and Polymer Composites ◽

10.1177/096739111302100206 ◽

2013 ◽

Vol 21 (2) ◽

pp. 93-100 ◽

Cited By ~ 5

Author(s):

Anett Király ◽

Ferenc Ronkay

Keyword(s):

Mechanical Properties ◽

Electrical Conductivity ◽

Carbon Black ◽

Bipolar Plates

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Enhanced electrical conductivity and piezoresistive sensing in multi-wall carbon nanotubes/polydimethylsiloxane nanocomposites via the construction of a self-segregated structure

Nanoscale ◽

10.1039/c7nr02322g ◽

2017 ◽

Vol 9 (31) ◽

pp. 11017-11026 ◽

Cited By ~ 106

Author(s):

Ming Wang ◽

Kai Zhang ◽

Xin-Xin Dai ◽

Yin Li ◽

Jiang Guo ◽

...

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Electrical Conductivity ◽

Percolation Threshold ◽

Multi Wall Carbon Nanotubes ◽

Segregated Structure

Self-segregated PDMS/MWCNT nanocomposites exhibit high piezoresistive sensitivity, low percolation threshold and an enhanced mechanical properties.

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Electrical Conductivity of Polystyrene-Rubber Blends Loaded with Carbon Black

Rubber Chemistry and Technology ◽

10.5254/1.3538419 ◽

1997 ◽

Vol 70 (1) ◽

pp. 60-70 ◽

Cited By ~ 33

Author(s):

B. G. Soares ◽

F. Gubbels ◽

R. Jéro^me ◽

E. Vanlathem ◽

R. Deltour

Keyword(s):

Electrical Conductivity ◽

Carbon Black ◽

Percolation Threshold ◽

Chemical Structure ◽

Two Phase ◽

Ethylene Propylene ◽

Rubber Blends ◽

Ethylene Propylene Rubber

Abstract Polystyrene/rubber blends have been loaded with carbon black (CB) and the filler localization in the two-phase polyblends has been studied in relation to the chemical structure of the rubber. The CB localization and the electrical conductivity are greatly influenced by the substitution of the rubber chains. In polystyrene/polybutadiene blends, the filler is localized within the polybutadiene phase. In contrast, in polystyrene/polyisoprene and polystyrene/ethylene—propylene rubber (EPM) blends, CB is mainly localized at the interface, so that the CB percolation threshold in cocontinuous two-phase polyblends is dramatically decreased.

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