Synthesis and surface attachment of ABC triblock copolymers containing glassy and rubbery segments

Jeffrey Pyun, Shijun Jia, Tomasz Kowalewski, Krzysztof Matyjaszewski

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

The synthesis of an ABC triblock copolymer containing glassy and rubbery segments was conducted using a combination of living anionic and atom transfer radical polymerizations (ATRP). A poly(dimethylsiloxane) (pDMS) macroinitiator (M̄n SEC = 6 200; M̄w/M̄ n = 1.19) was prepared by living anionic ring-opening polymerization, followed by hydrosilation reactions to incorporate 2-bromoisobutyrate end groups for initiation of ATRP. The ATRP of styrene (S) using the pDMS macroinitiator yielded a diblock copolymer (M̄n SEC = 66730; M̄w/M̄n = 1.38). Chain extension of the pDMS-b-pS macroinitiator with 3-(dimethoxymethylsilyl)propyl acrylate (DMSA) by ATRP yielded an ABC triblock copolymer. The latter reactive segment was covalently attached to silanol groups on a silicon wafer. The presentation of either glassy pS or flexible pDMS segments of the brushes attached to the surface was reversibly controlled by treatment with selective solvents for each segment.

Original languageEnglish (US)
Pages (from-to)411-417
Number of pages7
JournalMacromolecular Chemistry and Physics
Volume205
Issue number4
DOIs
StatePublished - Mar 4 2004
Externally publishedYes

Keywords

  • Atom transfer radical polymerization (ATRP)
  • Block copolymers
  • Brushes
  • Graft copolymers
  • Responsive surface

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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