Effect of double percolation on the electrical properties and electromagnetic interference shielding effectiveness of carbon-black-loaded polystyrene/ethylene vinyl acetate copolymer blends

2015 ◽  
Vol 133 (7) ◽  
pp. n/a-n/a ◽  
Author(s):  
Bluma G. Soares ◽  
François Touchaleaume ◽  
Loan F. Calheiros ◽  
Guilherme M. O. Barra
Keyword(s):  
Electrical Properties ◽  
Electromagnetic Interference ◽  
Ethylene Vinyl Acetate ◽  
Shielding Effectiveness ◽  
Electromagnetic Interference Shielding ◽  
Copolymer Blends ◽  
Electromagnetic Interference Shielding Effectiveness ◽  
Double Percolation ◽  
Acetate Copolymer ◽  
Ethylene Vinyl Acetate Copolymer

Synergistic effects of hybrid conductive fillers on the electrical properties of carbon fiber pultruded polypropylene/polycarbonate composites prepared by injection molding

2016 ◽  
Vol 51 (7) ◽  
pp. 1005-1017 ◽  
Author(s):  
Myung Geun Jang ◽  
Choonglai Cho ◽  
Woo Nyon Kim
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Carbon Fiber ◽  
Injection Molding ◽  
Electromagnetic Interference ◽  
Synergistic Effects ◽  
Shielding Effectiveness ◽  
Electromagnetic Interference Shielding ◽  
Preparation Methods ◽  
Electromagnetic Interference Shielding Effectiveness

In this study, the effects of filler characteristics and composite preparation methods on the morphology, mechanical property, electrical conductivity, and electromagnetic interference shielding effectiveness of the polypropylene/polycarbonate (70/30, wt%)/hybrid conductive filler composites were investigated. Nickel-coated carbon fiber (NCCF) was used as main filler and TiO2, multi-walled carbon nanotube, and graphite were used as second fillers in the composites. The pultruded NCCF/polypropylene composite was used in the preparation of the polypropylene/polycarbonate/NCCF/second filler composites. The electrical conductivity and electromagnetic interference shielding effectiveness of the polypropylene/polycarbonate/NCCF/second filler composites were compared with the type of second filler. The superior value of electromagnetic interference shielding effectiveness was observed to be 51.6 dB (decibel) when the hybrid fillers such as NCCF (5.2 vol% or 20 wt%) and TiO2 (1.2 vol% or 5 wt%) were added in the polypropylene/polycarbonate (70/30) composite. The electrical properties of the polypropylene/polycarbonate (70/30)/NCCF/TiO2 composites was compared with the composite preparation methods, which were injection molding and screw extrusion. The results suggested that fiber length of the NCCF affected significantly to the electrical conductivity and electromagnetic interference shielding effectiveness of the polypropylene/polycarbonate (70/30)/NCCF/TiO2 composites.

Electrical conductivity and electromagnetic interference shielding effectiveness of polyaniline-ethylene vinyl acetate composites

2004 ◽  
Vol 54 (2) ◽  
pp. 256-259 ◽  
Author(s):  
Narayan Chandra Das ◽  
Shinichi Yamazaki ◽  
Masamichi Hikosaka ◽  
Tapan Kumar Chaki ◽  
Dipak Khastgir ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Vinyl Acetate ◽  
Electromagnetic Interference ◽  
Ethylene Vinyl Acetate ◽  
Shielding Effectiveness ◽  
Electromagnetic Interference Shielding ◽  
Electromagnetic Interference Shielding Effectiveness
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