Water-assisted extrusion of polypropylene/clay nanocomposites: A comprehensive study
(2011) Polymer — Vol. 52, n° 2, p. 443-451 (2011)
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- Water-assisted extrusion process has been used to successfully prepare polypropylene (PP)/clay nanocomposites with high degree of clay delamination and markedly improved theological, thermal and mechanical properties. PP-graft-maleic anhydride (PP-g-MA)-based nanocomposites and masterbatches were synthesized from untreated clay and organoclay, respectively, and fully characterized. The effects of using high-shear rates and water injection during the melt-compounding were examined. A mechanism explaining the formation of such nanocomposites is then proposed. The best clay dispersion and properties improvements of PP-g-MA/organoclay nanocomposites and masterbatches were obtained using high-shear rates and water injection (synergy effect). PP-based nanocomposites were then synthesized by dilution of PP-g-MA-based masterbatches into neat PP. For comparison, nanocomposites were also prepared by a one-pot process where PP. PP-g-MA and organoclay are directly melt-blended with or without water injection. The nanocomposites prepared by dilution into PP of a masterbatch prepared through water-assisted extrusion showed the highest clay dispersion and consequently the best thermal, mechanical and theological properties. (C) 2010 Elsevier Ltd. All rights reserved.
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Rousseaux, D., Sallem, N., Baudouin, A.-C., Devaux, J., Godard, P., Marchand-Brynaert, J., & Sclavons, M. (2011). Water-assisted extrusion of polypropylene/clay nanocomposites: A comprehensive study. Polymer, 52(2), 443-451. https://doi.org/10.1016/j.polymer.2010.11.027 (Original work published 2011)