Distinguishing linear from star-branched polystyrene solutions with Fourier-transform rheology

Thorsten Neidhöfer, Stella Sioula, Nikolaos Hadjichristidis, Manfred Wilhelm*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Fourier-Transform rheology (FT rheology) was used to study the influence of the degree of branching on the nonlinear relaxation behaviour of polystyrene solutions. The results were compared with those obtained under oscillatory shear and step-shear conditions. The different topologies could be distinguished using FT rheology where the other rheological measurements failed. Significant differences occurred under large amplitude oscillatory shear (LAOS) conditions as particularly reflected in the phase difference of the third harmonic, Φ 3 , which could be related to strain-softening and strains-hardening behaviour. Currently, this work is extended towards different topologies in polyolefins (e.g. long chain branched).

Original languageEnglish (US)
Pages (from-to)1921-1926
Number of pages6
JournalMacromolecular Rapid Communications
Volume25
Issue number22
DOIs
StatePublished - Nov 12 2004

Keywords

  • FT rheology
  • Large amplitude oscillatory shear (LAOS)
  • Polystyrene
  • Viscoelastic properties

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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