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2008-11-01 - Article/Dans un journal avec peer-review - Anglais - 11 page(s)

Murariu Marius, Da Silva Ferreira A., Pluta M., Bonnaud Leila, Alexandre M., Dubois Philippe , "Polylactide (PLA)-CaSO4 composites toughened with low molecular weight and polymeric ester-like plasticizers and related performances" in European Polymer Journal, 44, 11, 3842-3852

  • 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) Large amounts of stable ß-anhydrite II (AII), a specific type of dehydrated gypsum and a by-product of lactic acid production process, can be melt-blended with bio-sourced and biodegradable polylactide (PLA) to produce economically interesting novel composites with high tensile strength and thermal stability. To enhance their toughness, while preserving an optimal stiffness, selected low molecular weight plasticizers (bis(2-ethylhexyl) adipate and glyceryl triacetate) and polymeric adipates with different molecular weights have been mixed with a specific PLA (l/d isomer ratio of 96/4) and 40 wt% of AII using an internal kneader. Addition of up to 10 wt% plasticizer into these highly filled compositions can trigger a fourfold increase of the impact strength with respect to the compositions without any modifier, cold crystallization properties and a significant decrease of their glass transition temperature. Moreover, these ternary compositions (PLA–AII–plasticizer) are clearly characterized by easier processing, notable thermo-mechanical performances and good filler dispersion. This study represents a new approach in formulating novel melt-processable polyester grades with improved characteristic features using PLA as biodegradable polymer matrix.

Notes :
  • (Anglais) Publié en ligne le 14 août 2008
  • (Anglais) Lecture en ligne: http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TWW-4T708CF-1-C&_cdi=5573&_user=532054&_pii=S0014305708003765&_origin=search&_coverDate=11%2F30%2F2008&_sk=999559988&view=c&wchp=dGLbVlb-zSkzk&md5=b9971c0a41919ec77eba4ae8e1e85c12
Identifiants :
  • DOI : 10.1016/j.eurpolymj.2008.07.055