Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 98, Issue 4, Pages 1799-1805Publisher
WILEY
DOI: 10.1002/app.22238
Keywords
conducting polymers; polyethylene (PE); polyolefins; poly(propylene) (PP)
Categories
Ask authors/readers for more resources
The electrical conductivities of various polyolefins filled with a high-structure carbon black (CB) were studied. Typical percolation behaviors were observed in all of the materials studied. At a critical CB content, which defined the percolation threshold, CB formed conductivity pathways, and resistivity fell sharply from a value characteristic of an insulator into the range of 10-100 Omega cm. The dependence of the percolation threshold on the matrix viscosity was understood in terms of competing effects on CB dispersion during blending and CB flocculation during compression molding. For the conditions used in this study, polypropylene with a melt flow index of about 50 was optimum. Flocculation in the quiescent melt was studied directly by atomic force microscopy. Conductivity pathways formed over time by CB agglomeration. The temperature dependence of the percolation time was described by an Arrhenius relationship. (c) 2005 Wiley Periodicals, Inc.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available