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Preparation of polypropylene nanocomposites by melt-mixing: Comparison between three organoclays

Abstract : Polypropylene (PP)-based nanocomposites reinforced with three different organoclays (Dellite© 67 G, Cloisite© 20, and Cloisite© 30B) were prepared via melt-mixing in an internal mixer. The three organoclays differ essentially via their organic modifier and interlamellar distance. The nanocomposites microstructure was characterized at different scales through SEM observations, X-ray diffractometry, and rheological measurements. The influence of processing parameters such as rotor speed and mixing time was quantified. The results show that Dellite© 67 G and Cloisite© 20 present a good dispersion state, with an intercalation of the tactoids by the polymer chains and a good level of exfoliation. In contrast, whatever the processing conditions, Cloisite© 30B was not dispersed correctly in the matrix, showing neither intercalation nor exfoliation, even in presence of compatibilizer.
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Submitted on : Wednesday, April 12, 2017 - 9:48:14 AM
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Guillaume Normand, Alice Mija, Sophie Pagnotta, Edith Peuvrel-Disdier, Bruno Vergnes. Preparation of polypropylene nanocomposites by melt-mixing: Comparison between three organoclays. Journal of Applied Polymer Science, Wiley, 2017, 134 (28), pp.45053 ⟨10.1002/app.45053⟩. ⟨hal-01506145⟩



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