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Rheology pp 575-580 | Cite as

Determination of the Thixotropic Property of an Emulsion Gel Paint

  • D. C.-H. Cheng
  • R. A. Richmond

Abstract

The term “thixotropy” was coined in the 1920’s to describe the phenomenon of isothermal reversible sol-gel transformation due to mechanical disturbance. The word took on additional meaning in the subsequent years and is now defined in a variety of glossaries (see Refs. 1 and 2). A review of the literature was made by Bauer and Collins3 in 1967. The most recent review is by Mewis2 in 1979. The latter lists three types of experimental methods for thixotropy:
  1. (1)

    step change in shear rate or shear stress (step-shear test),

     
  2. (2)

    consecutive linear increase and decrease in shear rate (loop test), and

     
  3. (3)

    sinusoidal change in shear rate (oscillatory test). All of these can be used to study the physical and chemical bases, the molecular and the particulate nature of thixotropic phenomena (the material science application). They can also be used to provide data for engineering applications, such as solution of equations of motion, mathematical modelling, empirical correlation of engineering data etc.

     

Keywords

Shear Rate Thixotropic Behaviour Oscillatory Test Dynamic Yield Stress Emulsion Paint 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    “Rheological terminology” in Rheol. Acta, 14: 1098 (1975).Google Scholar
  2. 2.
    J. Mewis, J. Non-N. Fluid Mech., 6: 1 (1979).MATHCrossRefGoogle Scholar
  3. 3.
    W.H. Bauer and E.A. Collins in. “Rheology Theory and Applications”, F.R. Eirich, ed, Academic Press, New York, 4: 423 (1967).Google Scholar
  4. 4.
    D.C-H. Cheng, “Res. Rept. No. LR 158 (MH)”, Warren Spring Laboratory, Stevenage, (1971).Google Scholar
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    D.C-H. Cheng, “Res. Rept. No. LR 157 (MH)”, Warren Spring Laboratory, Stevenage, (1971).Google Scholar
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    D.C-H. Cheng, Rheol. Acta, 12: 228 (1973).CrossRefGoogle Scholar
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    D.C-H. Cheng, Determination of the thixotropic property of bentonite-water dispersions. Paper to Joint Meeting of British, Italian and Netherlands Societies of Rheology, Amsterdam, April 1979.Google Scholar
  10. 10.
    D.C-H. Cheng, “Res. Rept. No. LR 203 (MH)”, Warren Spring Laboratory, Stevenage, (1974).Google Scholar
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    D.C-H. Cheng, J. Phys. P.: Appl. Phys., 7:L155 (1974).ADSCrossRefGoogle Scholar
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    D.C-H. Cheng, Bull. Brit. Soc. Rheol., 21: 60 (1978).Google Scholar
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    D.C-H. Cheng, Lecture 7 in “Postgraduate School in Rheology”, Chemical Society, London, p. 45 (1973).Google Scholar
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    D.C-H. Cheng, Chem. Ind., to be published, (1980).Google Scholar

Copyright information

© Springer Science+Business Media New York 1980

Authors and Affiliations

  • D. C.-H. Cheng
    • 1
  • R. A. Richmond
    • 1
  1. 1.Warren Spring LaboratoryStevenageUK

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