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2008-10-16 - Article/Dans un journal avec peer-review - Anglais - 11 page(s)

Raquez Jean Marie , Nabar Y., Srinivasan N., Shin B.-Y., Narayan R., Dubois Philippe , "Maleated thermoplastic starch by reactive extrusion" in Carbohydrate Polymers, 74, 2, 159-169

  • Edition : Elsevier Science
  • Codes CREF : Chimie macromoléculaire (DI1315), Catalyses hétérogène et homogène (DI1334)
  • Unités de recherche UMONS : Matériaux Polymères et Composites (S816)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
Texte intégral :

Abstract(s) :

(Anglais) Novel maleated thermoplastic starch (MTPS) with both improved processing and reactivity useful in the melt-blending with biodegradable polyester was prepared through in situ reactive modification of thermoplastic starch (TPS) with maleic anhydride (MA) as esterification agent. Glycerol was used as plasticizer. Physico-chemical parameters of MTPS were determined at different MA contents, while keeping both the content in glycerol (20 wt% by starch), and the processing temperature constant (150 °C). Soxhlet extraction attested for the complete incorporation of glycerol into the starch backbone during the maleation process at low content in MA. In addition, two-dimensional liquid-phase NMR measurements attested for the preferential esterification of starch backbone at C6, together with the occurrence of some hydrolysis and glucosidation reactions. Such reactions promoted by MA moieties reduced the intrinsic viscosity of the MTPS, expecting an improvement in its processability. WAXS diffraction analyses confirmed the complete disruption of the granular structure of native starch in MTPS during the reactive extrusion processing.

Notes :
  • (Anglais) Publié le 6 février 2008
  • (Anglais) Lecture en ligne: http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TFD-4RSBY5F-1-N&_cdi=5224&_user=532054&_pii=S014486170800057X&_origin=search&_coverDate=10%2F16%2F2008&_sk=999259997&view=c&wchp=dGLbVlz-zSkWA&md5=5911e9641ebb117fce86517463bd1389
Identifiants :
  • DOI : 10.1016/j.carbpol.2008.01.027