Morphology and Conductivity of Polymer Blends Filled with Carbon Black

1990 ◽  
Vol 214 ◽  
Author(s):  
G. Geuskens ◽  
E. De Kezel ◽  
S. Blacher ◽  
F. Brouers
Keyword(s):  
Electrical Conductivity ◽  
Image Analysis ◽  
Carbon Black ◽  
Polymer Blends ◽  
Percolation Threshold ◽  
Size Distribution ◽  
Sem Micrographs ◽  
Average Size ◽  
Three Phases

ABSTRACTIt has been shown that the electrical conductivity of polymer blends filled with carbon black (CB) can be much higher than that of each constituent for the same level of loading. It is very difficult to understand this phenomenon due to the complexity of the three phases system. In particular it has been argued that the results could not be explained if the morphology of the blend was independent of the amount of CB. Indeed, an image analysis of the TEM and SEM micrographs of polymer blends filled with Ketjenblack (KB), reveals that the size distribution of the polystyrene component of the blend changes with the concentration of KB. One observes that an increase of 5% in KB results in a reduction of the average size of the PS component by 50% Since the KB dispersion seems to be linked to the dispersion of the polystyrene component our findings could explain why the dispersion is improved in the blend and gives rise to a lower percolation threshold.

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

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.

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

2014 ◽  
Vol 188 ◽  
pp. 140-145 ◽  
Author(s):  
M. Pelíšková ◽  
P. Piyamanocha ◽  
J. Prokeš ◽  
M. Varga ◽  
P. Sáha
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Percolation Threshold ◽  
Butyl Acrylate

The electrical conductivity of polymer blends filled with carbon-black

1987 ◽  
Vol 23 (12) ◽  
pp. 993-995 ◽  
Author(s):  
G. Geuskens ◽  
J.L. Gielens ◽  
D. Geshef ◽  
R. Deltour
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Polymer Blends

Electrical Conductivity of Polystyrene-Rubber Blends Loaded with Carbon Black

1997 ◽  
Vol 70 (1) ◽  
pp. 60-70 ◽  
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.

Enhancing the electrical conductivity of carbon black-filled immiscible polymer blends by tuning the morphology

2016 ◽  
Vol 78 ◽  
pp. 106-115 ◽  
Author(s):  
Yamin Pan ◽  
Xianhu Liu ◽  
Xiaoqiong Hao ◽  
Zdeněk Starý ◽  
Dirk W. Schubert
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Polymer Blends ◽  
Immiscible Polymer Blends ◽  
Immiscible Polymer

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

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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