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Coagulation of latex dispersions by inorganic salts: structural effects

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Polymers as Colloid Systems

Part of the book series: Progress in Colloid & Polymer Science ((PROGCOLLOID,volume 72))

Abstract

Three types of latices were prepared by polymerization of styrene. In type 1 (without emulsifier) and type 2 series (with sodium dodecyl sulfate) the polymerization was initiated by different amounts of peroxodisulfate. Type 3 latices are co-polymers of styrene and styrene sulfonate prepared without initiator. The dispersions reveal significant differences when coagulated with salts. The differences are related to different surface structures. Type 1 latices are considered “classical” latices with smooth surface which are stabilized by electrostatic repulsion. Latex particles of type 3 are assumed to be surrounded by an envelope or a corona of hairs. The hairs add a considerable amount of steric stabilization to the electrostatic stabilization.

In both series the coagulation power increases from Li+ to Cs+ which is explained by changes of the water structure. For the same reason, the coagulation concentrations are also sensitive to the kind of co-ions (anions).

Lecture presented during the 32nd Annual Meeting of the Kolloid-Gesellschaft, Berlin October 2–4, 1985.

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Authors and Affiliations

  1. Institut für anorganische Chemie der Universität Kiel, Olshausenstraße 40, D-2300, Kiel, F.R.G.

    R. Zimehl & G. Lagaly

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  1. R. Zimehl
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  2. G. Lagaly
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J. Springer

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© 1985 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG

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Zimehl, R., Lagaly, G. (1985). Coagulation of latex dispersions by inorganic salts: structural effects. In: Springer, J. (eds) Polymers as Colloid Systems. Progress in Colloid & Polymer Science, vol 72. Steinkopff. https://doi.org/10.1007/BFb0114475

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  • DOI: https://doi.org/10.1007/BFb0114475

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  • Publisher Name: Steinkopff

  • Print ISBN: 978-3-7985-0728-9

  • Online ISBN: 978-3-7985-1695-3

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