Tunable and Durable Toughening of Polylactide Materials Via Reactive Extrusion

Authors

  • Georgio Kfoury,

    1. Department of Advanced Materials and Structures (AMS), Centre de Recherche Public Henri Tudor, Hautcharage, Luxembourg
    2. Laboratory of Polymeric and Composite Materials (LPCM), Centre d'Innovation et de Recherche en Matériaux Polymères (CIRMAP), UMONS Research Institute for Materials Science and Engineering, Université de Mons (UMONS), Mons, Belgium
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  • Fatima Hassouna,

    Corresponding author
    1. Department of Advanced Materials and Structures (AMS), Centre de Recherche Public Henri Tudor, Hautcharage, Luxembourg
    • Fatima Hassouna, Department of Advanced Materials and Structures (AMS)===, Centre de Recherche Public Henri Tudor===, Rue Bommel 5===, 4940===Hautcharage===Luxembourg======

      Philippe Dubois, Laboratory of Polymeric and Composite Materials (LPCM), Centre d'Innovation et de Recherche en Matériaux Polymères (CIRMAP), UMONS Research Institute for Materials Science and Engineering===, Université de Mons (UMONS)===, Place du Parc 23===, B-7000===Mons===Belgium======

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  • Jean-Marie Raquez,

    1. Laboratory of Polymeric and Composite Materials (LPCM), Centre d'Innovation et de Recherche en Matériaux Polymères (CIRMAP), UMONS Research Institute for Materials Science and Engineering, Université de Mons (UMONS), Mons, Belgium
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  • Valérie Toniazzo,

    1. Department of Advanced Materials and Structures (AMS), Centre de Recherche Public Henri Tudor, Hautcharage, Luxembourg
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  • David Ruch,

    1. Department of Advanced Materials and Structures (AMS), Centre de Recherche Public Henri Tudor, Hautcharage, Luxembourg
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  • Philippe Dubois

    Corresponding author
    1. Laboratory of Polymeric and Composite Materials (LPCM), Centre d'Innovation et de Recherche en Matériaux Polymères (CIRMAP), UMONS Research Institute for Materials Science and Engineering, Université de Mons (UMONS), Mons, Belgium
    • Fatima Hassouna, Department of Advanced Materials and Structures (AMS)===, Centre de Recherche Public Henri Tudor===, Rue Bommel 5===, 4940===Hautcharage===Luxembourg======

      Philippe Dubois, Laboratory of Polymeric and Composite Materials (LPCM), Centre d'Innovation et de Recherche en Matériaux Polymères (CIRMAP), UMONS Research Institute for Materials Science and Engineering===, Université de Mons (UMONS)===, Place du Parc 23===, B-7000===Mons===Belgium======

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Abstract

To tune the toughness of PLA, a novel pathway to chemically modify PLA via reactive extrusion in the presence of “reactive” PEG derivatives is proposed. PEG methyl ether methacrylate (MAPEG) and PEG methyl ether acrylate (AcrylPEG) are melt-mixed and extruded with PLA in the presence of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (L101) as a free-radical initiator. Molecular characterization reveals that about 20 and 65%, respectively, of the initially introduced MAPEG and AcrylPEG can be grafted onto the PLA backbone. The plasticization effect is demonstrated by a significant decrease of the glass transition temperature and storage modulus together with a significant increase of the elongation at break as compared to neat PLA.mame201300265-gra-0001

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