The effect of annealing conditions on the intercalation and exfoliation of layered silicates in polymer nanocomposites |
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| Authors: | Simona Ceccia Federica Bellucci Orietta Monticelli Alberto Frache Giuliano Traverso Antonio Casale |
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| Affiliation: | 1. Dipartimento di Scienza dei Materiali e Ingegneria Chimica, Politecnico di Torino sede di Alessandria, Viale Teresa Michel 5, 15100 Alessandria, Italy;2. Proplast, Consorzio per la promozione della cultura plastica, Strada Savonesa 9, Rivalta Scrivia, 15075 Alessandria, Italy;3. Dipartimento di Chimica e Chimica Industriale, Universita' di Genova, Via Dodecaneso 31, 16146 Genova, Italy |
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| Abstract: | Layered silicate nanocomposites based on polyamide 6 and polypropylene have been prepared via static annealing experiments. The evolution of clay dispersion into the polymer matrices was monitored by wide angle X‐ray diffraction analysis and transmission electron microscopy. The results have evidenced that the polymer diffusion inside the organoclay galleries is spontaneous and have elucidated the mechanism of nanostructured system formation under static conditions. Indeed, the exfoliation mechanism turned to be a two‐step process consisting of polymer intercalation into the clay galleries and progressive layer delamination. Both steps have turned out to depend on thermodynamic and kinetic parameters. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2010 |
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| Keywords: | annealing delamination mechanism nanocomposites organoclay |
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