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2005-08-23 - Article/Dans un journal avec peer-review - Anglais - 10 page(s)

Bernard Jacky, Schappacher M., Viville Pascal , Lazzaroni Roberto , Deffieux A., "Synthesis and Properties of PS-PEO Core-Shell Amphiphilic Dendrigrafts" in Polymer, 46, 18, 6767-6776

  • Edition : Elsevier Science, Oxford (United Kingdom)
  • Codes CREF : Chimie quantique (DI1321), Optique (DI1250)
  • Unités de recherche UMONS : Chimie des matériaux nouveaux (S817)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
Texte intégral :

Abstract(s) :

(Anglais) Water-soluble amphiphilic dendrigrafts constituted of a hydrophobic polystyrene core and a hydrophilic poly(ethylene oxide) shell have been prepared via a ‘grafting onto’ procedure from polystyrene dendrigraft precursors. The introduction of the surrounding hydrophilic shell was achieved through cyclic trans-acetalization between ?-acetal functionalized branches of the polystyrene precursor and PEO grafts bearing a a-bis(hydroxymethyl) chain end (A2-PEO). Yields of grafting are strongly affected by the increase of the degree of polymerization of the reactive PEO grafts (respectively, 100, 87, and 38% with A2-PEO20, A2-PEO100 and A2-PEO150). However, paradoxically, only the use of A2-PEO100 or A2-PEO150 as reactive grafts affords water-soluble dendrigrafts due to higher PEO weight content (respectively, 41 and 36%). The dimensions and the shape of the PScore–PEOshell polymers were investigated in solution (THF and water) by dynamic light scattering and in the dry state by TEM and AFM.

Notes :
  • (Anglais) Publié en ligne le 19 juillet 2005
  • (Anglais) Lecture en ligne: http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TXW-4GNKRS4-3-22&_cdi=5601&_user=532054&_pii=S0032386105008013&_orig=search&_coverDate=08%2F23%2F2005&_sk=999539981&view=c&wchp=dGLzVtz-zSkWb&md5=3a927c742f05201d1027f77fae4074ba&
Identifiants :
  • DOI : 10.1016/j.polymer.2005.06.059