Shear and extensional rheology and flow-induced orientation of carbon nanofiber/polystyrene melt composites

The rheological behavior and morphology of polystyrene/carbon nanofiber (PS/CNF) composites in their melt phase have been characterized through experimental measurements. Viscosity measurements of the PS/CNF composites in the linear viscoelastic regime show the ratio of the transient extensional vis...

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Veröffentlicht in:	Journal of applied polymer science 2011-02, Vol.119 (4), p.1940-1951
Hauptverfasser:	Miyazono, Koki, Kagarise, Christopher D., Koelling, Kurt W., Mahboob, Monon, Bechtel, Stephen E.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Carbon fibers Composites Exact sciences and technology Forms of application and semi-finished materials Materials science Melts morphology nanocomposites nanofiber Nanofibers Orientation Polymer industry, paints, wood Polymer matrix composites Polymers Polystyrene resins Rheological properties rheology Shear Technology of polymers
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Zusammenfassung:	The rheological behavior and morphology of polystyrene/carbon nanofiber (PS/CNF) composites in their melt phase have been characterized through experimental measurements. Viscosity measurements of the PS/CNF composites in the linear viscoelastic regime show the ratio of the transient extensional viscosity to the transient shear viscosity to be greater than three, the Trouton ratio. This behavior is due to differences in the flow‐induced orientation of CNFs in shear and extensional flow. The orientation development of the CNFs in shear and extensional flow was analyzed through a method utilizing transmission electron microscopy and was used to explain observed rheological phenomena. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
ISSN:	0021-8995 1097-4628 1097-4628
DOI:	10.1002/app.32923