The electrical conductivity of carbon nanotube/carbon black/polypropylene composites prepared through multistage stretching extrusion

Polymer ◽  
2012 ◽  
Vol 53 (7) ◽  
pp. 1602-1610 ◽  
Author(s):  
Ming Wen ◽  
Xiaojie Sun ◽  
Lin Su ◽  
Jiabin Shen ◽  
Jiang Li ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Carbon Black ◽  
Polypropylene Composites

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

2017 ◽  
Vol 4 (12) ◽  
pp. 170769 ◽  
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 .

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

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Abdelhafid Merzouki ◽  
Naceredine Haddaoui
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Percolation Threshold ◽  
Acetylene Black ◽  
Filler Concentration ◽  
Melt Mixing ◽  
Entire Concentration Range ◽  
Polypropylene Composites ◽  
Boltzman Equation ◽  
Good Agreement

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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