Electrical Conductivity Modeling of Polypropylene Composites Filled with Carbon Black and Acetylene Black

Composites of polypropylene filled with carbon black or acetylene black at different concentrations were prepared by melt mixing followed by compression molding. The influences of filler type and filler concentration on the composites conductivity were studied. It was found that the percolation threshold is located at a lower concentration in composites filled with the acetylene black, than that of the composites filled with carbon black. The model of Mamunya gives a fairly good agreement in the evaluation of the conductivity of polymeric composites loaded with carbon black or acetylene black, beyond the percolation threshold. The Boltzman equation was adopted to develop a model that represents more faithfully all results obtained. The expressions of the electrical conductivity, calculated with the model developed, are in good agreement with experimental results for the entire concentration range studied in linear or semilogarithmic scale.

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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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Electrical conductivity modeling and research of polypropylene composites filled with carbon black

Journal of Physics Conference Series ◽

10.1088/1742-6596/572/1/012032 ◽

2014 ◽

Vol 572 ◽

pp. 012032 ◽

Cited By ~ 4

Author(s):

A S Stepashkina ◽

E S Tsobkallo ◽

A N Alyoshin

Keyword(s):

Electrical Conductivity ◽

Carbon Black ◽

Polypropylene Composites ◽

Conductivity Modeling

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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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AC Electrical Properties of Titanate-Linkcoupled Carbon Black Filled Polypropylene Composites

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.217-219.644 ◽

2012 ◽

Vol 217-219 ◽

pp. 644-651

Author(s):

Nai Xiu Ding ◽

Li Li Wang ◽

Mao Sheng Zhan ◽

Liang Liu ◽

Shuai Feng Xu

Keyword(s):

Electrical Properties ◽

Carbon Black ◽

Volume Resistivity ◽

Dissipation Factor ◽

Experimental Result ◽

Filler Concentration ◽

Polypropylene Composites ◽

Conductive Composites ◽

Carbon Black Concentration ◽

Ac Electrical Properties

In this paper, Carbon black was activated using titanate-type coupling agent, and then filled into polypropylene to prepare conductive composites, whose alternating current (AC) electrical properties, including impendence Z, phase angel θ, dielectric constantε and dissipation factor tgδ that is a function of frequency and carbon black concentration were investigated by AC impedance spectroscopy. The percolation threshold of 5wt% carbon black concentration was obtained from the experimental result of volume resistivity for the conductive composites. It was found that the variation of AC electrical properties, which is a function of frequency, was dramatic and dependent on the filler concentration. It was also found that dependence of the real and the imaginary parts of impendence on frequency decreased with the increased concentration of carbon black, while the phase angle, dielectric constant and dissipation factor increased. The AC electrical properties were given based on the conductive network model and the corresponding equivalent circuit were concluded

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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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Effect of polyamide 6 on the morphology and electrical conductivity of carbon black-filled polypropylene composites

Royal Society Open Science ◽

10.1098/rsos.170769 ◽

2017 ◽

Vol 4 (12) ◽

pp. 170769 ◽

Cited By ~ 7

Author(s):

Xuewei Zhang ◽

Jiang Liu ◽

Yi Wang ◽

Wei Wu

Keyword(s):

Electrical Conductivity ◽

Carbon Black ◽

Plastic Material ◽

Conductive Polymer ◽

Polyamide 6 ◽

Surface Resistivity ◽

Electric Industry ◽

Polypropylene Composites ◽

Electrical Percolation ◽

Double Percolation

Carbon black (CB)-filled polypropylene (PP) with surface resistivity between 10 6 and 10 9 Ω sq −1 is the ideal antistatic plastic material in the electronics and electric industry. However, a large amount of CB may have an adverse effect on the mechanical properties and processing performance of the material, thus an improved ternary system is developed. Blends of CB-filled PP and polyamide 6 (PA6) have been prepared by melt blending in order to obtain electrically conductive polymer composites with a low electrical percolation threshold based on the concept of double percolation. The morphological developments of these composites were studied by scanning electron microscopy. The results showed that CB particles were selectively dispersed in PA6 phases due to the good interaction and interfacial adhesion between CB and PA6. At the same CB loadings, the surface resistivity of PP/PA6/CB composite was smaller than that of PP/CB composite system, which indicated the better conductivity in the former composite. The increasing amount of PA6 in the composites changed the morphology from a typical sea–island morphology to a co-continuous morphology. What is more, with 8 wt% of CB and PP/PA6 phase ratio of 70/30 in which the PP and PA6 phases formed a co-continuous structure, the electrical conductivity of the composite peaked at 2.01 × 10 5 Ω sq −1 .

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Properties of Cu-TiB2 Composites Fabricated by In-Situ Liquid Melt Mixing Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.15-17.215 ◽

2006 ◽

Vol 15-17 ◽

pp. 215-219 ◽

Cited By ~ 3

Author(s):

J.H Yun ◽

J.H. Kim ◽

J.S. Park ◽

Young Do Park ◽

Yong Ho Park ◽

...

Keyword(s):

Mechanical Properties ◽

Electrical Conductivity ◽

Young’S Modulus ◽

Young's Modulus ◽

Mixing Process ◽

Melt Mixing ◽

Maximum Value ◽

S Model ◽

Good Agreement

A Cu-TiB2 composite was successfully fabricated by in-situ liquid mixing process, and its microstructure, mechanical properties as well as electrical conductivity were evaluated. For Cu-2vol.%TiB2 composite, the hardness was as high as 5GPa and the Young’s modulus was 130GPa. And hardness and Young’s modulus of Cu-6vol.%TiB2 composite was 5.6Gpa and 138GPa, respectively. With the increase of the TiB2 content, hardness and Young’s modulus of Cu-10vol.%TiB2 composite were 20 and 12%, respectively, which was higher than that of Cu-2vol.%TiB2 composite. Young’s modulus of the Cu-TiB2 composite in this paper was in good agreement with the prediction by Hashin-Shtrikman (H-S) model. Furthermore, the electrical conductivity of the Cu-TiB2 composite showed its maximum value of about 78%IACS and decreased with the increase of the TiB2.

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Study of the Electrical and Tribologic Properties of CNTs-HDPE Composites

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.121-123.291 ◽

2007 ◽

Vol 121-123 ◽

pp. 291-294

Author(s):

F. Liu ◽

X.B. Zhang ◽

J.P. Cheng ◽

Y. Li ◽

X.Y. Tao ◽

...

Keyword(s):

Electrical Conductivity ◽

Wear Resistance ◽

Carbon Black ◽

Percolation Threshold ◽

Temperature Dependent ◽

Unique Structure ◽

Temperature Dependent Electrical Conductivity

CNTs-HDPE composites were prepared by the blend method. SEM was used to investigate the microstructure of the composites. The electrical and tribologic properties of the composites were studied respectively. The experiments showed that the percolation threshold of composites is about 3wt%, which is much lower than that of the carbon black-HDPE composites, and that the temperature-dependent electrical conductivity of composites had the PTC and double NTC characters, being also different from the carbon black-HDPE composites. These results are due to the unique structure and characters of CNTs. The frictional experiments demonstrated that the addition of CNTs would enhance the wear resistance of the composites.

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Effects of Molecular Weight and Annealing on Electrical Conductivity of Multi-Walled Carbon Nanotube/Polypropylene Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.447-448.619 ◽

2010 ◽

Vol 447-448 ◽

pp. 619-623

Author(s):

Yong Zheng Pan ◽

Lin Li ◽

Siew Hwa Chan ◽

Jian Hong Zhao

Keyword(s):

Electrical Conductivity ◽

Molecular Weight ◽

Mixing Process ◽

Melt Mixing ◽

Subsequent Formation ◽

Polypropylene Composites ◽

Post Annealing ◽

Multi Walled Carbon Nanotube ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

Composites of polypropylene (PP) and multi-walled carbon nanotubes (MWCNTs) were prepared by a micro melt mixing process. The molecular weight of PP was varied from 190,000 to 340,000 to examine its effects on the electrical conductivity. It has been discovered that a significant enhancement of electrical conductivity could be achieved by a thermal post annealing process above the melting temperature of PP. Factors such as annealing time, temperature, viscosity of PP, and content of MWCNTs all affected the enhancement of electrical conductivity. Re-aggregation of MWCNTs and the subsequent formation of MWCNT networks during annealing are considered to be the main reasons for the quick enhancement of electrical conductivity. The observed effect of molecular weight of PP on the enhancement of electrical conductivity suggested that the enhancement process could be controlled by diffusion of MWCNTs.

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