Synthesis of asymmetric difunctional initiators and their use in the preparation of block copolymers via ATRP and SFRP


Tunca U. , KARLIGA B., ERTEKIN S., UGUR A., Sirkecioglu O. , HIZAL G.

POLYMER, vol.42, no.20, pp.8489-8493, 2001 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 42 Issue: 20
  • Publication Date: 2001
  • Doi Number: 10.1016/s0032-3861(01)00235-x
  • Title of Journal : POLYMER
  • Page Numbers: pp.8489-8493

Abstract

Novel asymmetric difunctional initiators 2-phenyl-2-[(2,2,6,6-tetramethylpiperidino)oxy]ethyl 2-bromo-2-methyl propanoate and of 2phenyl-2-[(2,2,6,6-tetramethylpiperidino)oxy]ethyl 2-bromo propanoate were synthesized in a three-step reaction sequence and used in atom transfer radical polymerization (ATRP) of methyl methacrylate or tert-butyl acrylate leading to corresponding polymer with tempo moiety as chain end. These polymers were found to be efficient initiators for stable free radical polymerization (SFRP) of styrene. H-1 NMR and g.p.c. studies of the obtained polymers show that block copolymers are readily formed as a result of combination of ATRP and SFRP mechanisms. (C) 2001 Elsevier Science Ltd. All rights reserved.