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, sa.20, ss.8489-8493, 2001 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 42 Sayı: 20
  • Basım Tarihi: 2001
  • Doi Numarası: 10.1016/s0032-3861(01)00235-x
  • Dergi Adı: POLYMER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.8489-8493
  • Anahtar Kelimeler: asymmetric difunctional initiators, atom transfer radical polymerization, stable free radical polymerization, TRANSFER RADICAL POLYMERIZATION, STAR BLOCK, COMBINATION
  • İstanbul Teknik Üniversitesi Adresli: Evet

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.