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2008-06-01 - Article/Dans un journal avec peer-review - Anglais - 11 page(s)

Suriano Fabian, Coulembier Olivier , Degée Philippe, Dubois Philippe , "Carbohydrate-based amphiphilic diblock copolymers: synthesis, characterization and aqueous properties" in Journal of Polymer Science. Part A-1, Polymer Chemistry, 46, 11, 3662-3672

  • Edition : Wiley Interscience, New York (NY)
  • 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) Amphiphilic poly(e-caprolactone)-b-poly[(methacrylate-graft-poly(ethylene oxide))-co-6-O-methacryloyl-D-galactopyranose] (PCL-b-P(MAPEO-co-GaMa)) with various compositions and molecular weights were synthesized via a controlled four-step strategy. The first step involves the synthesis of functionalized poly(e-caprolactone) macroinitiator by ring-opening polymerization (ROP) of e-caprolactone (CL) as initiated by aluminum triisopropoxide (Al(OiPr)3). After selective bromination of the hydroxyl end-group of the resulting a-isopropoxy, ?-hydroxy poly(e-caprolactone) by using 2-bromoisobutyryl bromide, the controlled radical copolymerization of a-methoxy, ?-methacrylate poly(ethylene oxide) (MAPEO) with 6-O-methacryloyl-1,2;3,4-di-O-isopropylidene-D-galactopyranose (DIGaMa) was performed by atom transfer radical polymerization (ATRP) in THF at 60 °C using CuBr ligated with 1,1,4,7,10,10 hexamethyltriethylenetetramine (HMTETA) as catalytic complex. In the final step, isopropylidene protective functions were selectively removed using an aqueous formic acid solution leading to the expected amphiphilic graft copolymers. The molecular characterization of those copolymers was performed by 1H NMR spectroscopy and gel permeation chromatography (GPC) analysis. The self-assembly of the copolymers into micellar aggregates as well as the related critical micellization concentration (CMC) in aqueous media were determined by dynamic light scattering (DLS) and fluorescence spectroscopy, respectively. In parallel, the morphology of the solid deposits of micellar aggregates was examined with atomic force microscopy (AFM).

Notes :
  • (Anglais) Leccture en ligne: http://onlinelibrary.wiley.com/doi/10.1002/pola.22707/pdf
  • (Anglais) Publié en ligne le 25 avril 2008
Identifiants :
  • DOI : 10.1002/pola.22707