Chapter 112. Interaction of Silica Particles in a Model Rubber System: The Role of Silane Surface Treatments

  1. Prof. Dr. Norbert Auner4 and
  2. Prof. Dr. Johann Weis5
  1. Antoine Guillet1,
  2. Jacques Persello2 and
  3. Jean-Claude Morawski3

Published Online: 5 MAY 2008

DOI: 10.1002/9783527619924.ch112

Organosilicon Chemistry V: From Molecules to Materials

Organosilicon Chemistry V: From Molecules to Materials

How to Cite

Guillet, A., Persello, J. and Morawski, J.-C. (2008) Interaction of Silica Particles in a Model Rubber System: The Role of Silane Surface Treatments, in Organosilicon Chemistry V: From Molecules to Materials (eds N. Auner and J. Weis), Wiley-VCH Verlag GmbH, Weinheim, Germany. doi: 10.1002/9783527619924.ch112

Editor Information

  1. 4

    Department of Inorganic Chemistry, University of Frankfurt, Marie-Curie-Straße 11, 60439 Frankfurt am Main, Germany

  2. 5

    Consortium of Electrochemical Industry GmbH, Zielstattstraße 20, 81379 Munich, Germany

Author Information

  1. 1

    Crompton SA, 7, Rue du Pré Bouvier, 1217 Meyrin, Switzerland Tel: +41 22 989 2241 — Fax: +41 22 785 1140

  2. 2

    University of Franche-Comté, 25030 Besancon Cedex, France

  3. 3

    Ressources en Innovation, 49, rue Edouard Herriot, 69002 Lyon, France Tel: +33 4 78 37 54 69 — Fax: +33 4 78 37 54 29

Publication History

  1. Published Online: 5 MAY 2008
  2. Published Print: 26 SEP 2003

ISBN Information

Print ISBN: 9783527306701

Online ISBN: 9783527619924

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Keywords:

  • silica;
  • structure;
  • rheology;
  • silane

Summary

The nature of the silica surface has a strong influence on the rheology of filled rubber compounds. By reacting silica with silane coupling agents its surface properties can be controlled. A simple rubber model was used to understand the influence of organosilanes used as coupling agents in controlling the dispersibility and agglomeration of silica. The model system consists of monodisperse non-aggregated silica particles, silanes and squalene. Rheological properties were measured using steady shear and creep techniques at high filler volume fraction. Particular emphasis was placed on observing the transition between liquid-like and solid-like behavior at the maximum packing volume. Results obtained on the rubber model indicate that it is possible to measure and observe the silica agglomeration process at very low shear. Under these conditions the rheology and thixotropic behavior of silane-treated silica are highly depending on surface treatment. The method particularly allows understanding the widely different processing behavior of various organofunctional silanes. The observed trends are consistent with those observed in rubber compounds. Small-angle neutron scattering (SANS) techniques were used to study the short-range arrangement of silica aggregates and the structure factor of the concentrated silica-squalene system. Light diffraction was used to measure the occurrence of larger agglomerates. Finally it is shown how the silane structure affects both the dispersion of silica particles and the agglomeration-deagglomeration process.