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Processing and rheological behavior of ABS/montmorillonite nanocomposites via single screw capillary extrusion
Author(s) -
Sánchez Saul E.,
Ibarra Rigoberto
Publication year - 2011
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21980
Subject(s) - extrusion , materials science , montmorillonite , rheometry , rheology , die swell , composite material , shear rate , nanocomposite , capillary action , shear thinning , viscosity , shear (geology)
Abstract Evidence for intercalated and exfoliated clay nanostructures was found in Acrylonitrile‐butadiene‐styrene/montmorillonite (MMT) compounds. Formulations with MMT from 0.5 to 9 vol. % have been processed by single screw capillary extrusion. Melt rheology showed that the onset of shear thinning shifts to lower shear rates until one order in magnitude in shear rate ( $\dot{\gamma}$ ), as modified clay increases. On the other hand, the viscosity at zero shear (η 0 ) augments in the order of 650% in the highest concentration sample. Furthermore, viscosity curves from capillary rheometry showed a strong shear thinning behavior as clay content is increased. From X‐ray diffraction, it is inferred a nanoclay d‐spacing increase independent from the clay content in capillary extrusion samples. Transmission Electron Microscopy shows intercalated/exfoliated clay structures from capillary extrusion. Proper processing conditions in conventional equipment for plastics transformation, may lead to obtain intercalated and exfoliated nanocomposites without complex tooling configuration. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers