The Rheological Behavior of Ceramic/Polymer Mixtures for Coextrusion Processing
Coextrusion is a novel fabrication method for ceramic processing. However, the rheological behavior of ceramic/polymer blends during batching and extrusion in a coextrusion process is not well understood. In this study, the rheological properties of BaTiO3/polymer mixtures during batching in a high-shear rate mixer (C.W. Brabender) were investigated and several models were evaluated. The BaTiO3/polymer mixtures exhibited shear thinning behavior with a yield stress. The power-law model still fit for the data obtained from the high-shear rate mixer in the tested shear rate range. The results also showed that Bousmina's model only fits well for the pure polymer melts. For the ceramic/polymer mixtures, large deviations from Bousmina's model were observed.
X. Xu and G. Hilmas, "The Rheological Behavior of Ceramic/Polymer Mixtures for Coextrusion Processing," Journal of Materials Science, Springer Verlag, Feb 2007.
The definitive version is available at http://dx.doi.org/10.1007/s10853-006-1221-2
Materials Science and Engineering
Keywords and Phrases
Batching; Coextrusion; Rheological Behavior; Shear Thinning Behavior; Yield Stress
Article - Journal
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