Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 212, Issue 22, Pages 2429-2438Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201100364
Keywords
carbon nanostructure materials; electrical conductivity; melt rheological behavior; nanocomposites; poly(propylene) (PP)
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Funding
- National Science Foundation-Nanoscale Interdisciplinary Research Team and Materials Processing and Manufacturing [CMMI 10-30755]
- Welch Foundation [V-0004]
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PP nanocomposites containing different carbon nanofillers (CNTs, CNFs, GnPs, CB) are fabricated and further processed by hot compression molding. A high level of nanofiller dispersion is found. The NCs exhibit improved thermal stability and higher crystallinity. Both electrical conductivity and real permittivity increase with increasing nanofiller loading. A strongly aspect ratio dependent electrical conductivity percolation is observed at loadings of 15.0, 12.0, 5.0, and 3.0 wt% for CB, GnPs, CNFs, and CNTs, respectively. The rheological behavior of the NC melts is also investigated. A small concentration of the nanofillers is found to affect the modulus and viscosity of the PP melts significantly.
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