Thiophenol derivatives as a reducing agent for in situ generation of Cu(I) species via electron transfer reaction in copper-catalyzed living/controlled radical polymerization of styrene


Tunca Ü. , Tunca Ü. , Hızal G.

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol.44, no.20, pp.5923-5932, 2006 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 44 Issue: 20
  • Publication Date: 2006
  • Doi Number: 10.1002/pola.21672
  • Title of Journal : JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
  • Page Numbers: pp.5923-5932
  • Keywords: copper catalyzed living radical polymerization, electron transfer reaction, thiophenol derivatives, TERMINATOR MULTIFUNCTIONAL INITIATOR, METHYL-METHACRYLATE, DENDRITIC MACROMOLECULES, CONVENTIONAL MONOMERS, FLASH-PHOTOLYSIS, VINYL MONOMERS, ADDITION RATES, THIYL RADICALS, COMPLEXES, COMBINATION

Abstract

The copper-catalyzed living radical polymerization (LRP) of styrene (St) was carried out in the presence of thiophenol derivative such as sodium thiophenolate (PhSNa) or p-methoxythiophenol as a reducing agent for Cu(II) by using either 1-chloro-1-phenyl ethane or ethyl-2-bromoisobutyrate as an initiator and pentamethyldiethylenetriamine as ligand at 110 degrees C. Kinetic experiments were carried out to reveal the effect of PhSNa concentration on copper-catalyzed LRP of St. This technique was successfully applied for the preparation of both chain-extended polymer and block copolymer polystyrene-b-poly(methyl methacrylate). The obtained polymers were characterized using GPC, H-1-NMR, and MALDI-TOF measurements. (c) 2006 Wiley Periodicals, Inc.