Temperature-induced ordering and gelation of star micelles based on ABA triblocks synthesized via aqueous RAFT polymerization

Stacey Kirkland-York, Keith Gallow, Jacob Ray, Yueh Lin Loo, Charles McCormick

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

The reversible formation of ordered physical gels from stimuli-responsive ABA [A = poly(N,N-dimethylacrylamide) (PDMA), B = poly(N-isopropylacrylamide) (PNIPAM)] triblock copolymers is investigated utilizing dynamic light scattering, small angle X-ray scattering, and low-shear rheometry. As the temperature is increased above the phase transition temperature of the PNIPAM segment, triblock copolymers under a critical molecular weight are capable of packing into body-centered cubic arrays. Rheometric tests indicate that the storage moduli of the gels at 50 °C are inversely related to the molecular weight of the polymer.

Original languageEnglish (US)
Pages (from-to)2179-2182
Number of pages4
JournalSoft matter
Volume5
Issue number11
DOIs
StatePublished - Jul 14 2009

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics

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