Small-diameter parallel plate rheometry: a simple technique for measuring rheological properties of glass-forming liquids in shear

Olli-Ville Laukkanen

Research output: Contribution to journalArticleScientificpeer-review

23 Citations (Scopus)
178 Downloads (Pure)

Abstract

The rheological characterization of glass-forming liquids is challenging due to their extreme temperature dependence and high stiffness at low temperatures. This study focuses on the special precautions that need to be taken to accommodate high sample stiffness and torsional instrument compliance in shear rheological experiments. The measurement errors due to the instrument compliance can be avoided by employing small-diameter parallel plate (SDPP) rheometry in combination of numerical instrument compliance corrections. Measurements of that type demonstrate that accurate and reliable rheological data can be obtained by SDPP rheometry despite unusually small diameter-to-gap (d/h) ratios. Specimen preparation for SDPP requires special attention, but then experiments show excellent repeatability. Advantages and some current applications of SDPP rheometry are briefly reviewed. SDPP rheometry is seen as a simple and versatile way to measure rheological properties of glass-forming liquids especially near their glass transition temperature.
Original languageEnglish
Pages (from-to)661–671
JournalRheologica Acta
Volume56
Issue number7–8
DOIs
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • Rheometry
  • Glass-forming liquids
  • Instrument compliance
  • Measurement repeatability

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