Dynamic Formation of Graft Polymers via Radical Crossover Reaction of Alkoxyamines

Yuji Higaki, Hideyuki Otsuka, Atsushi Takahara

Research output: Contribution to journalArticlepeer-review

83 Citations (Scopus)

Abstract

A novel dynamic polymer reaction system using radical exchange of alkoxyamine units has been demonstrated. Poly(methacrylic ester) having 2,2,6,6-tetramethylpiperidine-1-oxy (TEMPO)-based alkoxyamine units in the side chain and TEMPO-based alkoxyamine-terminated polystyrene were prepared by atom transfer radical polymerization (ATRP) and nitroxide-mediated free radical polymerization (NMP), respectively. By the use of living radical polymerization techniques, the molecular weights of each polymer were accurately controlled. Radical crossover reaction of alkoxyamine units between the side chain and chain end of each polymer afforded the graft polymer which polystyrene chains are connected to the poly(methacrylic ester) backbone. Equilibrium M n apparently depends on the feed ratio of polymers. The structure of the graft polymers is supported by size exclusion chromatography (SEC) and spectral data. The obtained graft polymer could be transformed reversibly to the starting materials by heating with excess amount of alkoxyamine derivative.

Original languageEnglish
Pages (from-to)1696-1701
Number of pages6
JournalMacromolecules
Volume37
Issue number5
DOIs
Publication statusPublished - Mar 9 2004

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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