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Theoretical prediction of the elastic contribution to steric stabilization

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  • Colloid Science
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Summary

It is shown how it is possible to use the Flory network theory to develop simple analytic formulae for the elastic contribution (first proposed byJäckel) to the steric stabilization by macromolecules. Constant segment density and gaussian segment density distribution models are discussed. It seems likely that the elastic contribution is negligible in the interpenetration domain but becomes important as significant compression occurs. Incipient flocculation is inferred to occur in a pseudo-secondary minimum, the depth of which is almost independent of any elastic contribution.

Zusammenfassung

Es wird gezeigt, daß die Netzwerktheorie vonFlory benutzt werden kann, einfache analytische Ausdrücke zu entwickeln für den elastischen Anteil der sterischen Stabilisierung durch Makromoleküle. Konstante Segmentdichte und Gaußverteilung der Segmentdichte werden vorausgesetzt. Es ist wahrscheinlich, daß der elastische Anteil im Bereich der wechselseitigen Durchdringung vernachlässigt werden kann, aber wirksam wird bei merklicher Kompression. Die Anfangsstadien der Flockung hängen mit dem pseudosekundären Minimum zusammen, dessen Tiefe nahezu unabhängig ist von jedem elastischen Beitrag.

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Authors and Affiliations

  1. Department of Physical Chemistry, University of Sydney, 2006, N. S. W., Australia

    R. Evans,  J. B. Smitham &  D. H. Napper

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  1. R. Evans
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  2. J. B. Smitham
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  3. D. H. Napper
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Evans, R., Smitham, J.B. & Napper, D.H. Theoretical prediction of the elastic contribution to steric stabilization. Colloid & Polymer Sci 255, 161–167 (1977). https://doi.org/10.1007/BF01777275

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  • DOI: https://doi.org/10.1007/BF01777275

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