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2010-06-02 - Article/Dans un journal avec peer-review - Anglais - 7 page(s)

Goffin Anne-Lise, Duquesne Emmanuël, Raquez Jean Marie , Miltner H.E., Ke Xiaoxing, Alexandre M., Van Tendeloo Gustaaf, Van Mele Bruno, Dubois Philippe , "From polyester grafting onto POSS nanocage by ring-opening polymerization to high performance polyester/POSS nanocomposites" in Journal of Materials Chemistry B, 20, 42, 9415-9422

  • Edition : Royal Society of Chemistry (United Kingdom)
  • 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) Polyester-grafted polyhedral oligomeric silsesquioxane (POSS) nanohybrids selectively produced by ring-opening polymerization of e-caprolactone and L,L-lactide (A.-L. Goffin, E. Duquesne, S. Moins, M. Alexandre, Ph. Dubois, Eur. Polym. Journal, 2007, 43, 4103) were studied as “masterbatches” by melt-blending within their corresponding commercial polymeric matrices, i.e., poly(e-caprolactone) (PCL) and poly(L,L-lactide) (PLA). For the sake of comparison, neat POSS nanoparticles were also dispersed in PCL and PLA. The objective was to prepare aliphatic polyester-based nanocomposites with enhanced crystallization behavior, and therefore, enhanced thermo-mechanical properties. Wide-angle X-ray scattering and transmission electron microscopy attested for the dispersion of individualized POSS nanoparticles in the resulting nanocomposite materials only when the polyester-grafted POSS nanohybrid was used as a masterbatch. The large impact of such finely dispersed (grafted) nanoparticles on the crystallization behavior for the corresponding polyester matrices was noticed, as evidenced by differential scanning calorimetry analysis. Indeed, well-dispersed POSS nanoparticles acted as efficient nucleating sites, significantly increasing the crystallinity degree of both PCL and PLA matrices. As a result, a positive impact on thermo-mechanical properties was highlighted by dynamic mechanical thermal analysis.

Identifiants :
  • DOI : 10.1039/c0jm00283f