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Increasing mechanical resilience and enhanced electrical conductivity through the incorporation of CNF reinforcing additives in PA6 nanocomposites.

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Název: Increasing mechanical resilience and enhanced electrical conductivity through the incorporation of CNF reinforcing additives in PA6 nanocomposites.
Autoři: Buchanan, J. Paige, Reed-Gore, Erin R., Jefcoat, Jennifer A., Moser, Robert D., Klaus, Kyle L., Peel, Hannah R., Buchanan, Randy K., Barnes, Eftihia, Alberts, Erik M., Shukla, Manoj K.
Zdroj: Structural Chemistry; Feb2019, Vol. 30 Issue 1, p341-349, 9p
Témata: CARBON nanofibers, ELECTRIC conductivity, POLYAMIDES, POLYMERIC nanocomposites, TENSILE strength
Abstrakt: In pursuit of strong, tough, and functional advanced composite materials, a series of polymer nanocomposite blends were prepared from the engineering thermoplastic polyamide 6 (PA6) and increasing admixtures of carbon nanofibers (CNF) up to 8 wt%. The combination of high sheer mixing and solvent processing techniques employed produced free-standing films of 40-60-μm thickness, which were characterized for mechanical performance, dispersion, thermal behavior, and electrical conductivity. The combination of XRD, FTIR, Raman, and SEM analysis supported a dominant α-phase PA6 and good dispersion of the CNF. CNF:PA6 composite films yield an impressive ~ 500% elongation at break for 2 wt% CNF, with more modest increases in tensile strength and elastic modulus over the unmodified PA6. DSC analysis suggests strong interfacial forces between additive and polymer, with a nucleating effect on the formation of crystallites. Increasing CNF loading leads to enhanced thermal stability, and a significant increase in electrical conductivity was observed at low loadings of CNF. These materials show great promise for use in advanced composites applications. [ABSTRACT FROM AUTHOR]
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Databáze: Complementary Index
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Abstrakt:In pursuit of strong, tough, and functional advanced composite materials, a series of polymer nanocomposite blends were prepared from the engineering thermoplastic polyamide 6 (PA6) and increasing admixtures of carbon nanofibers (CNF) up to 8 wt%. The combination of high sheer mixing and solvent processing techniques employed produced free-standing films of 40-60-μm thickness, which were characterized for mechanical performance, dispersion, thermal behavior, and electrical conductivity. The combination of XRD, FTIR, Raman, and SEM analysis supported a dominant α-phase PA6 and good dispersion of the CNF. CNF:PA6 composite films yield an impressive ~ 500% elongation at break for 2 wt% CNF, with more modest increases in tensile strength and elastic modulus over the unmodified PA6. DSC analysis suggests strong interfacial forces between additive and polymer, with a nucleating effect on the formation of crystallites. Increasing CNF loading leads to enhanced thermal stability, and a significant increase in electrical conductivity was observed at low loadings of CNF. These materials show great promise for use in advanced composites applications. [ABSTRACT FROM AUTHOR]
ISSN:10400400
DOI:10.1007/s11224-018-1236-8