Selective location and double percolation of short carbon fiber filled polymer blends: high-density polyethylene/isotactic polypropylene

The percolation threshold of high-density polyethylene (HDPE)/isotactic polypropylene (iPP) blends filled with vapor-grown carbon fiber (VGCF), 1.25 parts per hundred parts resin (phr) VGCF content, is much lower than those of the individual polymers. SEM micrographs verified that the improvement of...

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Bibliographic Details
Published in:Materials letters 1998-07, Vol.36 (1-4), p.186-190
Main Authors: Zhang, C, Yi, X.S, Yui, H, Asai, S, Sumita, M
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Double percolation
Electrical conductivity
Exact sciences and technology
Forms of application and semi-finished materials
Polymer blends
Polymer industry, paints, wood
Selective location
Short carbon fiber
Technology of polymers
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Summary:The percolation threshold of high-density polyethylene (HDPE)/isotactic polypropylene (iPP) blends filled with vapor-grown carbon fiber (VGCF), 1.25 parts per hundred parts resin (phr) VGCF content, is much lower than those of the individual polymers. SEM micrographs verified that the improvement of electrical conductivity can be attributed to the selective location of VGCF in the HDPE phase. A double percolation is the basic requirement for the conductivity of the composites, i.e., the percolation of carbon fibers in the HDPE phase, and the continuity of this phase in the polymer blends. Short carbon fibers may affect the morphology of the polymer blends.
ISSN:0167-577X
1873-4979
DOI:10.1016/S0167-577X(98)00023-8