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

Olli Ville Laukkanen

doi:10.1007/s00397-017-1020-5

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

Olli Ville Laukkanen^*

^*Corresponding author for this work

Not published at VTT

Aalto University
University of Massachusetts Amherst

Research output: Contribution to journal › Article › Scientific › peer-review

50 Citations (Scopus)

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 language	English
Pages (from-to)	661-671
Number of pages	11
Journal	Rheologica Acta
Volume	56
Issue number	7-8
DOIs	https://doi.org/10.1007/s00397-017-1020-5
Publication status	Published - 1 Aug 2017
MoE publication type	A1 Journal article-refereed

Funding

Financial support from the Vilho, Yrjö, and Kalle Väisälä Foundation is gratefully acknowledged. The author also wishes to thank Anton Paar GmbH and Malvern Instruments Ltd. for technical support and equipment loans, Prof. Gregory McKenna and Dr. Stephen Hutcheson for providing plate diameter-dependent rheological data of glycerol, and Prof. H. Henning Winter for helping in the preparation of the manuscript.

Keywords

Glass-forming liquids
Instrument compliance
Measurement repeatability
Rheometry

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10.1007/s00397-017-1020-5

Cite this

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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.",

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

Abstract

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