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Solubility factors as screening tools of biodegradable toughening agents of polylactide

Article dans une revue avec comité de lecture
Author
RUELLAN, Alexandre
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
135725 Génie industriel alimentaire [GENIAL]
GUINAULT, Alain
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
SOLLOGOUB, Cyrille
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
213743 Propriétés et architectures des alliages et mélanges [P2AM]
DUCRUET, Violette
135725 Génie industriel alimentaire [GENIAL]
DOMENEK, Sandra
135725 Génie industriel alimentaire [GENIAL]

URI
http://hdl.handle.net/10985/10337
DOI
10.1002/APP.42476
Date
2015
Journal
Journal of Applied Polymer Science

Abstract

Changes in the thermomechanical properties of polylactide (PLA) plasticized by two biodegradable and biobased molecules, Polysorb ID37 (PID37) and squalene, were compared to formulations with petroleum-based plasticizers, namely, acetyl tributyl citrate, poly(ethylene glycol) 400, and dioctyl adipate (DOA). The solubility parameters of the additives were calculated and were related to the plasticization behaviors. PID37 proved to be miscible with PLA because of its polar functions and short alkyl groups. It decreased the PLA glass-transition temperature (Tg) and increased in ductility when Tg approached room temperature. Squalene had a low miscibility because of the absence of polar groups. Tg was not depressed. Ductility improvements were nevertheless reached because the immiscible inclusions efficiently induced crazing by the distribution of stress concentration points all over the material; this delayed failure. The maximum elongations at break were 60% for squalene, 400% for DOA, and 500% for PID37. The solubility factors were, thus, an efficient prediction tool for the plasticizing behavior

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