ORBi: Li Haiying - Combination of ring-opening polymerization and "click" chemistry for the synthesis of an amphiphilic tadpole-shaped poly(epsilon-caprolactone) grafted by PEO

Reference : Combination of ring-opening polymerization and "click" chemistry for the synthesis of an...


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Materials science & engineering Physical, chemical, mathematical & earth Sciences : Physics Physical, chemical, mathematical & earth Sciences : Chemistry
	To cite this reference:	http://hdl.handle.net/2268/932

Title :	Combination of ring-opening polymerization and "click" chemistry for the synthesis of an amphiphilic tadpole-shaped poly(epsilon-caprolactone) grafted by PEO
Language :	English
Author, co-author :	Li, Haiying [> > > >]
	Riva, Raphaël [Université de Liège - ULg > > Centre d'études et de rech. sur les macromolécules (CERM) >]
	Jérôme, Robert [Université de Liège - ULg > > Centre d'études et de rech. sur les macromolécules (CERM) >]
	Lecomte, Philippe [Université de Liège - ULg > > Centre d'études et de rech. sur les macromolécules (CERM) >]
Publication date :	20-Feb-2007
Journal title :	Macromolecules
Publisher :	Amer Chemical Soc
Volume :	40
Issue/season :	4
Pages :	824-831
Audience :	International
ISSN :	0024-9297
City :	Washington
Keywords :	[en] ring-opening polymerization ; lactone ; macrocycle ; click chemistryoaddition ; copper-mediated Huisgen's cycloaddition ; polymer functionalization
Abstract :	[en] A tadpole shaped poly(epsilon-caprolactone) (PCL; Mn = 24 500) was made amphiphilic by grafting the two PCL tails with PEO. In the first step, a macrocyclic PCL was synthesized by ring-opening polymerization of epsilon-caprolactone (epsilon-CL) initiated by a cyclic tin(IV) dialkoxide and stabilized by local intramolecular photo-cross-linking. In the second step, the polymerization of a mixture of epsilon CL and alpha-chloro-epsilon-caprolactone (alpha Cl epsilon CL) was resumed with formation of two activated chloride containing PCL tails. In the third step, the chlorides were converted into azides onto which alkynyl end-capped PEO was grafted by the copper-mediated Huisgen's cycloaddition [3 + 2], thus giving a "click" reaction. The thermal properties of the final copolymer and the precursors were analyzed by differential scanning calorimetry. The amphiphilicity of the final copolymer was confirmed by micellization in water.
Research units :	Center for Education and Research on Macromolecules (CERM)
Funders :	Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/932
DOI :	10.1021/ma062488f
Other URL :	http://pubs.acs.org/cgi-bin/article.cgi/mamobx/2007/40/i04/pdf/ma062488f.pdf

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