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, cilt.42, ss.8489-8493, 2001 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 42 Konu: 20
  • Basım Tarihi: 2001
  • Doi Numarası: 10.1016/s0032-3861(01)00235-x
  • Dergi Adı: POLYMER
  • Sayfa Sayıları: ss.8489-8493

Özet

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.