Synthesis and characterization of well-defined ABC-type triblock copolymers via atom transfer radical polymerization and stable free-radical polymerization

Tunca U., Erdogan T., Hizal G.

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol.40, no.12, pp.2025-2032, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 40 Issue: 12
  • Publication Date: 2002
  • Doi Number: 10.1002/pola.10300
  • Journal Name: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2025-2032
  • Keywords: atom transfer radical polymerization (ATRP), stable free-radical polymerization (SFRP), triblock copolymer, BLOCK-COPOLYMERS, BUTYL ACRYLATE, STAR BLOCK, INITIATORS, ATRP, COMBINATION, STYRENE, GRAFT
  • Istanbul Technical University Affiliated: Yes

Abstract

An asymmetric difunctional initiator 2-phenyl-2-[(2,2,6,6 tetramethylpiperidino)oxyl ethyl 2-bromo propanoate (1) was used for the synthesis of ABC-type methyl methacrylate (MMA)-tert-butylacrylate (tBA)-styrene (St) triblock copolymers via a combination of atom transfer radical polymerization (ATRP) and stable free-radical polymerization (SFRP). The ATRP-ATRP-SFRP or SFRP-ATRP-ATRP route led to ABC-type triblock copolymers with controlled molecular weight and moderate poly-dispersity (M-w/M-n < 1.35). The block copolymers were characterized by gel permeation chromatography and H-1 NMR. The retaining chain-end functionality and the applying halide exchange afforded high blocking efficiency as well as maintained control over entire routes. (C) 2002 Wiley Periodicals, Inc.