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Polymer Bulletin

, Volume 49, Issue 4, pp 235–242 | Cite as

Synthesis of end-branched poly(ethylene glycol)s by aqueous atom transfer radical polymerization

  • Jens H. Trueken
  • Jorgen Kops
  • Walther Batsberg
  • Steven P. Armes

Summary

This article reports the synthesis of novel hydrophilic end-branched poly(ethylene glycol)s, in aqueous media by atom transfer radical polymerization (ATRP). Poly(ethylene glycol)s with molecular weights 10,000 and 16,000 were end-functionalized and used as bifunctional initiators for the polymerization of a poly(ethylene glycol) macromonomer with a molecular weight of 2,000 (PEGMA), either by aqueous ATRP or in a watedmethanol (l/l V/V) mixture. For both macroinitiators a DP of 10 was the target, giving an average of 5 branches in each end. The rates of polymerization were of the same order of magnitude when the polymerizations were initiated by either of the two macroinitiators in watedmethanol (l/l V/V). When a bifunctional oligo(ethy1ene glycol) initiator (Mn = 600) was used to study the polymerization of PEGMA in water/methanol a reduction in the rate of polymerization was observed indicating an influence of the molecular weight of the initiator on the rate of polymerization.

Keywords

Polymerization Ethylene Molecular Weight Glycol Aqueous Medium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Jens H. Trueken
    • 1
  • Jorgen Kops
    • 1
  • Walther Batsberg
    • 2
  • Steven P. Armes
    • 3
  1. 1.Danish Polymer Centre, Department of Chemical Engineering, Technical University of Denmark. Building 423. DK-2800 Kgs. Lyngby Denmark e-mail ik@ht dtu dk, Tel +45 45252969, Fax +45 45882161DK
  2. 2.Danish Polymer Centre, Rise National Laboratory, DK-4000 Roskilde DenmarkDK
  3. 3.School of Chemistry, Physics and Environmental Science, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom.GB

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