A powerful tool for preparing peripherally post-functionalized multiarm star block copolymer


Çakır Yiğit N., Hızal G., Tunca Ü.

POLYMER BULLETIN, vol.75, no.8, pp.3523-3538, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 75 Issue: 8
  • Publication Date: 2018
  • Doi Number: 10.1007/s00289-017-2218-5
  • Journal Name: POLYMER BULLETIN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3523-3538
  • Keywords: ATRP, "Arm-first'' approach, Multiarm star polymer, Post-functionalization, Nucleophilic substitution reaction, LIVING RADICAL POLYMERIZATION, POLYMERS, PENTAFLUOROSTYRENE
  • Istanbul Technical University Affiliated: Yes

Abstract

A facile synthetic approach for the design of peripherally post-functionalized multiarm star block copolymer has been established by nucleophilic aromatic substitution reaction of pentafluorophenyl periphery functional multiarm star polymer with alcohol moieties of poly(ethylene glycol) (PEG-OH) under mild reaction conditions. For this purpose, alpha-fluoro-functionalized PS (alpha-fluoro-PS) was prepared by atom transfer radical polymerization (ATRP) of styrene (St) and was allowed to react with divinyl benzene (DVB) as a linking agent yielding (fluoro-PS)(n)-polyDVB multiarm star polymer. Then, (PEG)(m)-(PS)(n)-polyDVB multiarm star block copolymer was synthesized via nucleophilic addition of PEG-OH precursor with (fluoro-PS)(n)-polyDVB multiarm star polymer in the presence of sodium hydride in tetrahydrofuran at reflux for 3 h. Multiarm star polymers were characterized using triple detection gel permeation chromatography (TD-GPC), FT-IR, H-1 NMR, F-19 NMR and C-13 NMR.