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Some colloid-chemical features of emulsion polymerisation

  • K. Tauer
  • I. Kühn
  • H. Kaspar
Thomas-Graham-Medal
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 101)

Abstract

Emulsion polymerisation is of great technical and economical importance as well as a process with a lot of colloid chemical features. Two of these colloid features, namely particle nucleation and swelling of polymer particles with monomer, are considered in more detail. It is shown that the particle nucleation can be described with a model based on the classical nucleation theory. This consideration is able to predict the chain length of the nucleating oligomers which is mainly influenced by the water solubility of the oligomers. With increasing water solubility the chain length of the nucleating oligomers becomes longer in good accordance with experiemntal findings. The activation energy of nucleation turned out to be a crucial parameter for further theoretical developments on particle nucleation in emulsion polymerisation. In this sense the development of a set-up for experimental investigations of the nucleation process is of importance. With a new developed experimental set-up based on a combination of on-line tansmission and conductivity measurement with offline particle size analytic it is possible to investigate the nucleation period. The results obtained so far indicate a strong influence of the emulsifier concentration on the particle concentration time curves in the very early stages of an emulsion polymerisation. Swelling experiments have been performed with toluene and latexes carrying chemically different stabilising groups. The latexes have been cleaned very carefully by ultrafiltration before they have been used. The results prove the enormous influence of the nature of the particle water interface on the swelling cpabilityof the particles. It is to conclude that the Morton-Kaizerman-Altier equation cannot be applied for a complete be applied for a complete description of latex particle swelling.

Key words

Emulsion polymerisation particle nucleation classical nucleation theory latex particle swelling 

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References

  1. 1.
    Markert G (1984) Angew Makromol Chem 123/124:285–306Google Scholar
  2. 2.
    Angaben des Statistischen Bundesamt der Bundesrupublik Deutschland, BerlinGoogle Scholar
  3. 3.
    Gilbert RG (1995) Emulsion Polymerization, Academic Press, LondonGoogle Scholar
  4. 4.
    Harkins WD (1947) J Am Chem Soc 69:1428–1444CrossRefGoogle Scholar
  5. 5.
    Smith WV, Ewart RH (1948) J Chem Phys 16:592–599CrossRefGoogle Scholar
  6. 6.
    Fitch RM, Tsai CH (1971) In: Fitch RM (ed) Polymer Colloids. Plenum, New York, pp 73–102Google Scholar
  7. 7.
    Lichti G, Gilbert RG, Napper DH (1983) J Pol Sci-Polym Chem 21:269–291CrossRefGoogle Scholar
  8. 8.
    Adamson AW (1990) Physical Chemistry of Surfaces. John Wiley & Sons, Inc, New York, pp 364–378Google Scholar
  9. 9.
    barrett KEJ (1975) Dispersion Polymerization in Organic media. John Wiley & Sons, London, pp 131–177Google Scholar
  10. 10.
    Carra S, Morbidelli M, Storti G (1985) Physics of Amphiphiles: Micelles, Vesicles and Microemulsions, XV Corso. Soc. Italiana di Fisica, Bologna, pp 483–512Google Scholar
  11. 11.
    Tauer K, Kühn I (1995) Macromolecules 28:2236–2239CrossRefGoogle Scholar
  12. 12.
    Morrison BR, Gilbert RG (1995) Macromol Symp 92:13–30Google Scholar
  13. 13.
    Schmutzler K, Kakuschke R, Hergeth W-D (1989) Acta Polymerica 40:238–242CrossRefGoogle Scholar
  14. 14.
    Shen S, Sudol ED, El-Asser MS (1994) J Pol Sci Part A: Pol Chem 32: 1087–1100CrossRefGoogle Scholar
  15. 15.
    Kühn I, Tauer K (1995) Macromolecules (in press)Google Scholar
  16. 16.
    Verner B, Bárta M, Sedlácek B (1976) Table of Scattering Functions for Spherical Particles. Edice Macro, PragueGoogle Scholar
  17. 17.
    Gardon JL (1968) J Polym Sci 6:2859–2879Google Scholar
  18. 18.
    Morton M, Kaizerman S, Altier MW (1954) J Coll Sci 9:300–312CrossRefGoogle Scholar
  19. 19.
    Antonietti M, Kaspar H, Tauer K (to be published)Google Scholar

Copyright information

© Steinkopff Verlag 1996

Authors and Affiliations

  • K. Tauer
    • 1
  • I. Kühn
    • 1
  • H. Kaspar
    • 1
  1. 1.Max-Planck-Institut für Kolloidund GrenzflächenforschungTeltow-SeehofFRG

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