Preparation and characterization of maleated thermoplastic starch-based nanocomposites

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

Research output: Contribution to journalArticle

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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.

LanguageEnglish (US)
Pages639-647
Number of pages9
JournalJournal of Applied Polymer Science
Volume122
Issue number1
DOIs
StatePublished - Oct 5 2011

Profile

Starch
Thermoplastics
Nanocomposites
Maleic Anhydrides
Maleic anhydride
Clay
Bentonite
Plasticizers
Graft copolymers
Transesterification
Steam
Esterification
Platelets
Clay minerals
Glycerol
Water vapor
Elongation
Microscopic examination
Tensile strength
Copolymers

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. 2011 ; Vol. 122, No. 1. pp. 639-647
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