Plasticized and nanofilled poly(lactic acid)‐based cast films: Effect of plasticizer and organoclay on processability and final properties |
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| Authors: | Marco Scatto Elena Salmini Stefania Castiello Maria‐Beatrice Coltelli Lucia Conzatti Paola Stagnaro Leonardo Andreotti Simona Bronco |
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| Affiliation: | 1. Centro Italiano Packaging, Via delle Industrie 25/8, 30175 Venezia Marghera, Italy;2. Dipartimento di Chimica e Chimica Industriale, Via Risorgimento 35, 56126 Pisa, Italy;3. SPIN‐PET, Spin‐off Company of the University of Pisa, Via Risorgimento 35, 56126 Pisa, Italy;4. ISMAC‐CNR UOS Genova, Via De Marini 6, I‐16149 Genova, Italy;5. Istituto per i Processi Chimico‐Fisici (IPCF‐CNR) Area della Ricerca, Via G. Moruzzi 1, I‐56124 Pisa, Italy |
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| Abstract: | PLA‐based nanocomposites filled with the commercial organomodified montmorillonite Dellite 43B (D43B) and containing acetyl tri‐n‐butyl citrate (ATBC) as plasticizer were prepared by extrusion in a pilot‐scale twin‐screw extruder and melt casted into flexible films. A preliminary investigation was carried out in a laboratory batch mixer by varying blending conditions and addition procedures of the components. Indeed, the method of addition of ATBC and D43B considerably affected thermo‐mechanical properties and morphology of the resultant nanocomposites. The simultaneous introduction of both ATBC and D43B during the extrusion process allowed producing clearly exfoliated nanocomposite materials with modulated mechanical and thermal properties. Moreover, rheological results, obtained during melt extrusion, assessed the processability of nanofilled‐plasticized PLA, making this simple procedure interesting in view of the industrial production of nanostructured biomaterials based on plasticized PLA. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2013 |
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| Keywords: | extrusion nanocomposites organoclay mechanical properties renewable resources |
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