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Viscoelastic properties of plastic fat products

  • Technical
  • Published:
Journal of the American Oil Chemists’ Society

Abstract

An instrument is described for the creep analysis of plastic fat products. The instrument records the deformation of a sample under constant force. Deformation is sensed by a displacement transducer. Instantaneous elasticity, retarded elasticity and plastic flow can be calculated. The extent of instantaneous elasticity of plastic fat products was found to be dependent on loading time. At longer loading times, the instantaneous elasticity as a percentage of total deformation decreased, with a corresponding increase in permanent deformation. The effects of temperature, magnitude of force and work softening were investigated. The results are discussed in relation to the nature of the crystal network structure in plastic fat products.

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Author information

Authors and Affiliations

  1. Department of Food Science, University of Guelph, N1G 2W1, Guelph, Ont., Canada

    J. M. DeMan & S. Gupta

  2. Research Branch, Agriculture Canada, Engineering and Statistical Research Institute, K1A 0C6, Ottawa, Ont., Canada

    M. Kloek & G. E. Timbers

Authors
  1. J. M. DeMan
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  2. S. Gupta
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  3. M. Kloek
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  4. G. E. Timbers
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Cite this article

DeMan, J.M., Gupta, S., Kloek, M. et al. Viscoelastic properties of plastic fat products. J Am Oil Chem Soc 62, 1672–1675 (1985). https://doi.org/10.1007/BF02541663

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  • DOI: https://doi.org/10.1007/BF02541663

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