One-pot synthesis of star-block copolymers using double click reactions

Hakan Durmaz, Aydan Dag, Alp Hizal, Gurkan Hizal, Umit Tunca*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

89 Citations (Scopus)


3-Arm star-block copolymers, (polystyrene-b-poly(methyl methacrylate)) 3, (PS-b-PMMA)3, and (polystyrene-b-poly(ethylene glycol))3, (PS-b-PEG)3, are prepared using double-click reactions: Huisgen and Diels-Alder, with a one-pot technique. PS and PMMA blocks with x-anthracene-ω-azide- and x-maleimide-end-groups, respectively, are achieved using suitable initiators in ATRP of styrene and MMA, respectively. However, PEG obtained from a commercial source is reacted with 3-acetyl-N-(2-hydroxyethyl)-7-oxabicyclor2.2.1.]hept-5-ene-2-carboxamide (7) to give furan-protected maleimide-end-functionalized PEG. Finally, PS/PMMA and PS/PEG blocks are linked efficiently with trialkyne functional linking agent 1,1,1-tris[4-(2-propynyloxy)-phenyl]-ethane 2 in the presence of CuBr/N,N,N′,N″,N″-pentamethyldiethylenetriamine (PMDETA) at 120°C for 48 h to give two samples of 3-arm star-block copolymers. The results of the peak splitting using a Gaussian deconvolution of the obtained GPC traces for (PS-b-PMMA)3 and (PS-b-PEG)3 displayed that the yields of target 3-arm star-block copolymers were found to be 88 and 82%, respectively.

Original languageEnglish
Pages (from-to)7091-7100
Number of pages10
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Issue number21
Publication statusPublished - 1 Nov 2008


  • Atom transfer radical polymerization
  • Click reactions
  • Diels-Alder reaction
  • Gel permeation chromatography (GPC)
  • Huisgen reaction
  • NMR
  • One-pot technique
  • Polyethers
  • Polystyrene
  • Star polymers
  • Star-block copolymers


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