H-shaped (ABCDE type) quintopolymer via click reaction [3+2] strategy

Gungor E., Durmaz H., Hızal G., Tunca Ü.

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol.46, no.13, pp.4459-4468, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 46 Issue: 13
  • Publication Date: 2008
  • Doi Number: 10.1002/pola.22781
  • Journal Name: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4459-4468
  • Keywords: atom transfer radical polymerization (ATRP), H-shaped polymer, nitroxide mediated radical polymerization, nonlinear polymer, poly(epsilon-caprolactone), poly(ethylene glycol), poly(methyl methacrylate), polystyrene, poly(tert-butyl acrylate), ring opening polymerization, [3+2] click reaction, MODEL GRAFT-COPOLYMERS, MIKTOARM STAR, RADICAL POLYMERIZATION, COMBINATION, TERPOLYMERS
  • Istanbul Technical University Affiliated: Yes

Abstract

H-shaped quintopolymer containing different five blocks: poly(epsilon-caprolactone) (PCL), polystyrene (PS), poly(ethylene glycol) (PEG), and poly(methyl methacrylate) (PMMA) as side chains and poly(tert-butyl acrylate) (PtBA) as a main chain was simply prepared from a click reaction between azide end-functionalized PCL-PS-PtBA 3-miktoarm star terpolymer and PEG-PMMA-block copolymer with alkyne at the junction point, using Cu(I)/N,N,N',N '',N '',-pentamethyldiethylenetriamine (PMDETA) as a catalyst in DMF at room temperature for 20 h. The H-shaped quintopolymer was obtained with a number-average molecular weight (M-n) around 32,000 and low polydispersity index (M-w/M-n) 1.20 as determined by GPC analysis in THF using PS standards. The click reaction efficiency was calculated to have 60% from H-1 NMR spectroscopy. (c) 2008 Wiley Periodicals, Inc.