Advanced SearchSearch Tips
Study on lowering the percolation threshold of carbon nanotube-filled conductive polypropylene composites
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
  • Journal title : Carbon letters
  • Volume 15, Issue 2,  2014, pp.117-124
  • Publisher : Korean Carbon Society
  • DOI : 10.5714/CL.2014.15.2.117
 Title & Authors
Study on lowering the percolation threshold of carbon nanotube-filled conductive polypropylene composites
Park, Seung Bin; Lee, Moo Sung; Park, Min;
  PDF(new window)
Conductive polymer composites (CPCs) consist of a polymeric matrix and a conductive filler, for example, carbon black, carbon fibers, graphite or carbon nanotubes (CNTs). The critical amount of the electrically conductive filler necessary to build up a continuous conductive network, and accordingly, to make the material conductive; is referred to as the percolation threshold. From technical and economical viewpoints, it is desirable to decrease the conductive-filler percolation-threshold as much as possible. In this study, we investigated the effect of polymer/conductive-filler interactions, as well as the processing and morphological development of low-percolation-threshold () conductive-polymer composites. The aim of the study was to produce conductive composites containing less multi-walled CNTs (MWCNTs) than required for pure polypropylene (PP) through two approaches: one using various mixing methods and the other using immiscible polymer blends. Variants of the conductive PP composite filled with MWCNT was prepared by dry mixing, melt mixing, mechanofusion, and compression molding. The percolation threshold () of the MWCNT-PP composites was most successfully lowered using the mechanofusion process than with any other mixing method (2-5 wt%). The mechanofusion process was found to enhance formation of a percolation network structure, and to ensure a more uniform state of dispersion in the CPCs. The immiscible-polymer blends were prepared by melt mixing (internal mixer) poly(vinylidene fluoride) (PVDF, PP/PVDF, volume ratio 1:1) filled with MWCNT.
conductive polymer composite;multi-walled carbon nanotube;polypropylene;
 Cited by
Thermally Conductive-Silicone Composites with Thermally Reversible Cross-links, ACS Applied Materials & Interfaces, 2016, 8, 22, 13669  crossref(new windwow)
Flexural properties, interlaminar shear strength and morphology of phenolic matrix composites reinforced with xGnP-coated carbon fibers, Carbon letters, 2016, 17, 1, 33  crossref(new windwow)
Characterization and influence of shear flow on the surface resistivity and mixing condition on the dispersion quality of multi-walled carbon nanotube/polycarbonate nanocomposites, Carbon letters, 2015, 16, 2, 86  crossref(new windwow)
Electromagnetic interference shielding in 1–18 GHz frequency and electrical property correlations in poly(vinylidene fluoride)–multi-walled carbon nanotube composites, Phys. Chem. Chem. Phys., 2015, 17, 31, 20347  crossref(new windwow)
Feng J, Chan CM. Carbon black-filled immiscible blends of poly(vinylidene fluoride) and high density polyethylene: electrical properties and morphology. Polym Eng Sci, 38, 1649 (1998). crossref(new window)

Potschke P, Bhattacharyya AR, Janke A. Morphology and electrical resistivity of melt mixed blends of polyethylene and carbon nanotube filled polycarbonate. Polymer, 44, 8061 (2003). crossref(new window)

Wu M, Shaw LL. On the improved properties of injection-molded, carbon nanotube-filled PET/PVDF blends. J Power Sources, 136, 37 (2004). crossref(new window)

Wu M, Shaw L. Electrical and mechanical behaviors of carbon nanotube-filled polymer blends. J Appl Polym Sci, 99, 477 (2006). crossref(new window)

Xu HP, Dang ZM, Yao SH, Jiang MJ, Wang D. Exploration of unusual electrical properties in carbon black/binary-polymer nanocomposites. Appl Phys Lett, 90, 152912 (2007). crossref(new window)

Han JH. Current Status on Synthesis of Carbon Nanotubes and Their Applications to Conducting Polymer. Polymer Science and Technology, 16, 162 (2005).

Yi XS, Wu G, Ma D. Property balancing for polyethylene-based carbon black-filled conductive composites. J Appl Polym Sci, 67, 131 (1998).<131::AID-APP15>3.0.CO;2-4. crossref(new window)

Leclere P, Lazzaroni R, Gubbels F, Calberg F, Dubois P, Jerome R, Bredas JL. Carbon black-filled polymer blends: a scanning probe microscopy characterization. MRS Online Proc Lib, 457, 475 (1996). crossref(new window)

Andrews R, Jacques D, Minot M, Rantell T. Fabrication of carbon multiwall nanotube/polymer composites by shear mixing. macromolecular materials and engineering, 287, 395 (2002).<395::AID-MAME395>3.0.CO;2-S. crossref(new window)

Ajayan PM, Stephan O, Colliex C, Trauth D. Aligned carbon nanotube arrays formed by cutting a polymer resin--nanotube composite. Science, 265, 1212 (1994). crossref(new window)

Calvert P. Nanotube composites: a recipe for strength. Nature, 399, 210 (1999). crossref(new window)

Smuckler JH, Finnerty PM. Performance of conductive carbon blacks in a typical plastics system. Adv Chem Ser, 134, 171 (1974). crossref(new window)

Verhelst WF, Wolthuis KG, Voet A, Ehrburger P, Donnet JB. The role of morphology and structure of carbon blacks in the electrical conductance of vulcanizates. Rubber Chem Technol, 50, 735 (1977). crossref(new window)

Gubbels F, Jerome R, Teyssie P, Vanlathem E, Deltour R, Calderone A, Parente V, Bredas JL. Selective localization of carbon black in immiscible polymer blends: a useful tool to design electrical conductive composites. Macromolecules, 27, 1972 (1994). crossref(new window)

Runyan WR. Semiconductor Measurements and Instrumentation, McGraw-Hill, New York, NY (1975).

Masci G, Aulenta F, Crescenzi V. Uniform-sized clenbuterol molecularly imprinted polymers prepared with methacrylic acid or acrylamide as an interacting monomer. J Appl Polym Sci, 83, 2660 (2002). crossref(new window)

Miller B. Intumescents, FR efficiency pace flame retardant gains. Plastics World, 54, 73 (1996).