Atom transfer radical polymerization of 1,3-butadiene using novel CuBr/pyridine-2-carboxamide catalysts

Seoung Uk Heo, Gwang Hoon Rhee, Dong Heon Lee, Jung Hee Kim, Dai Seung Choi, Do Weon Lee

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Atom transfer radical polymerization (ATRP) is one of the most successful methods to polymerize styrenes, (meth)acrylates, and a variety of other monomers in a controlled fashion. Novel ligands, 4-alkyl pyridine-2-carboxamides [R = methyl (4a), t-butyl (4b), H (4c)], have been prepared through the reaction of 4-alkyl-2-cyanopyridine with water in the presence of 0.4 mol% of base in ethanol solution. The living free radical polymerization of 1,3-butadiene was facile in the presence of the CuBr/4a catalytic system. Several effects, such as those of the ligand, solvent, and temperature, and a kinetic study of the ATRP of 1,3-butadiene (BD), were studied systematically. The optimum conditions for the ATRP of BD were [CuBr]o/[4a]o/[PEBr] o/[BD]o = 1:2:1:100 at 80°C in veratrole solution (w/w= 1:2); these conditions yielded well-defined polybutadiene (PBD) with a narrow molecular weight distribution (1.40).

Original languageEnglish
Pages (from-to)241-247
Number of pages7
JournalJournal of Industrial and Engineering Chemistry
Volume12
Issue number2
StatePublished - Mar 2006

Keywords

  • 1,3-Butadiene (BD)
  • Atom transfer radical polymerization (ATRP)
  • Catalyst
  • Controlled/"living" radical polymerization
  • Pyridine-2-carboxamide

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