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The rheological behavior of ceramic/polymer mixtures for coextrusion processing

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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.

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Acknowledgements

We would like to thank Amanda Young (UMR) and John Suwarbi (Rheometric Scientific Co.) for their valuable input to this research.

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  1. Department of Materials Science and Engineering, University of Missouri-Rolla, Rolla, MO, 65401, USA

    X. Xu & G. E. Hilmas

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  1. X. Xu
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  2. G. E. Hilmas
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Correspondence to G. E. Hilmas.

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Xu, X., Hilmas, G.E. The rheological behavior of ceramic/polymer mixtures for coextrusion processing. J Mater Sci 42, 1381–1387 (2007). https://doi.org/10.1007/s10853-006-1221-2

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