Chromatographic investigation of macromolecules in the critical range of liquid chromatography, 14: Analysis of miktoarm star (μ-star) polymers

H. Pasch*, E. Esser, C. Kloninger, H. Iatrou, Nikolaos Hadjichristidis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Miktoarm (μ-star) polymers are star-shaped block copolymers where chemically different homopolymers constitute the different arms. The quantitative determination of different segments of the star polymers by liquid chromatography under critical conditions (LC-CC) is described. In the present study tri-arm and tetra-arm model polymers with polystyrene, polybutadiene, polyisoprene and poly-α-methyl styrene arms are analyzed. Operating at the respective critical conditions, homopolymer arms are made chromatographically invisible. Under these conditions the residual (chromatographically visible) arms can be analyzed with regard to their molar masses. The accuracy of the quantification depends on the fit of the calibration procedure and the detector response to the actual chemical compositions. The results clearly indicate that LC-CC yields valuable structural information on block copolymers with complex architectures.

Original languageEnglish (US)
Pages (from-to)1424-1429
Number of pages6
JournalMacromolecular Chemistry and Physics
Volume202
Issue number8
DOIs
StatePublished - Jun 15 2001

ASJC Scopus subject areas

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

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