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Real-Time Monitoring of Polymer Nanocomposites Composition during Extrusion Compounding

Published

Author(s)

Rick D. Davis, Jeffrey W. Gilman, Anthony J. Bur, M M. McBrearty, P R. Start, Young J. Lee

Abstract

Dielectirc spectroscopy was conducted during extrusion processing of polyamide-6 (PA6) and layered silicate/polyamide-6 manocomposites. Dielectric dispersion parameteers were identified that appear sensitive to layered silicate concentration and degree of exfoliation. Specific to measuring layered silicate concentration is that the Maxwell-Wagner strength of dispersion, delta epsilonmw, increase linearly with the % mass fraction layered silicate content. This relationship is independent of exfoliation resulting in nanomorphology-averaged delta epsilondmw values that reflect layered silicate concentration; i.e. 12,800 {+ or-} 519 indicates 1.29% mass fraction of a layered silicate in PA6. The nanomorphology is primarily reflected in the Maxwell-Wagner characteristic relaxation frequency value, fmw, where for example, 80.4 {+or-} 5Hz indicates a mixed intercalated/exfoliated nanomorphology. However, following the nanomorphology with the fdmw value can in some significant difference in the conductive resistance and segmental mobility of these polymers, as indicated by the sigmaDC and fda values. For f^da values that are much larger than determined for the intercalated nanocomposites.
Citation
Plasma Processes and Polymers
Volume
45 No. 19

Citation

Davis, R. , Gilman, J. , Bur, A. , McBrearty, M. , Start, P. and Lee, Y. (2004), Real-Time Monitoring of Polymer Nanocomposites Composition during Extrusion Compounding, Plasma Processes and Polymers (Accessed June 15, 2024)

Issues

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Created September 1, 2004, Updated February 19, 2017