Preparation and characterization of maleated thermoplastic starch-based nanocomposites

Jean Marie Raquez, Yogaraj Nabar, Ramani Narayan, Philippe Dubois

    Research output: Contribution to journalArticle

    • 14 Citations

    Abstract

    Biodegradable nanoscale-reinforced starch-based products were prepared from an in situ chemically modified thermoplastic starch and poly(butylene adipate-co-terephthalate) (PBAT) through reactive processing. Natural montmorillonite (hydrophilic Cloisite Na) and organophilic Cloisite 30B were studied. In situ chemically modified thermoplastic starch (MTPS) was first prepared starting from (nano)clay (previously swollen in glycerol as plasticizer), and maleic anhydride (MA) as an esterification agent. Then, these nanoscale-reinforced MTPS was reactively melt-blended with PBAT through transesterification reactions promoted by MA-derived acidic moieties grafted onto the starch backbone. The tensile and barrier properties of resulting (nano)composites were studied. High-performance formulations with superior tensile strength (>35 MPa as compared with 16 MPa for the PBAT-g-MTPS copolymer) and break elongation (>800%) were obtained, particularly with Cloisite30B. Better water vapor and oxygen barrier properties of nanoscale-reinforced MTPS-g-PBAT were achieved rather than the PRECURSORS. Wide angle X-ray diffraction and transmission electronic microscopy analyses show that partial exfoliation of the clay platelets was observed within the PBAT-g-MTPS graft copolymer-Cloisite 30B nanocomposite.

    Original languageEnglish (US)
    Pages (from-to)639-647
    Number of pages9
    JournalJournal of Applied Polymer Science
    Volume122
    Issue number1
    DOIs
    StatePublished - Oct 5 2011

    Profile

    Starch
    Thermoplastics
    Maleic anhydride
    Nanocomposites
    Clay
    Laryngeal Mucosa
    Graft copolymers
    Transesterification
    Plasticizers
    Esterification
    Platelets
    Clay minerals
    Glycerol
    Water vapor
    Elongation
    Microscopic examination
    Tensile strength
    Copolymers
    X ray diffraction
    Oxygen

    Keywords

    • biodegradable
    • nanocomposites
    • polyester
    • reactive extrusion
    • starch

    ASJC Scopus subject areas

    • Materials Chemistry
    • Polymers and Plastics
    • Surfaces, Coatings and Films
    • Chemistry(all)

    Cite this

    Preparation and characterization of maleated thermoplastic starch-based nanocomposites. / Raquez, Jean Marie; Nabar, Yogaraj; Narayan, Ramani; Dubois, Philippe.

    In: Journal of Applied Polymer Science, Vol. 122, No. 1, 05.10.2011, p. 639-647.

    Research output: Contribution to journalArticle

    Raquez, Jean Marie; Nabar, Yogaraj; Narayan, Ramani; Dubois, Philippe / Preparation and characterization of maleated thermoplastic starch-based nanocomposites.

    In: Journal of Applied Polymer Science, Vol. 122, No. 1, 05.10.2011, p. 639-647.

    Research output: Contribution to journalArticle

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