Hostname: page-component-7bb8b95d7b-l4ctd Total loading time: 0 Render date: 2024-09-22T12:20:54.130Z Has data issue: false hasContentIssue false
  • English
  • Français

Interfacial Interactions in Silica Reinforced Silicones

Published online by Cambridge University Press:  21 February 2011

Mirta I. Aranguren ,
Christopher W. Macosko ,
Bima Thakkar  and
Matthew Tirrell
Mirta I. Aranguren
Affiliation:
University of Minnesota, Dept of Chemical Engineering and Materials Science, 421 Washington Ave.SE., Minneapolis, MN 55455
Christopher W. Macosko
Affiliation:
University of Minnesota, Dept of Chemical Engineering and Materials Science, 421 Washington Ave.SE., Minneapolis, MN 55455
Bima Thakkar
Affiliation:
University of Minnesota, Dept of Chemical Engineering and Materials Science, 421 Washington Ave.SE., Minneapolis, MN 55455
Matthew Tirrell
Affiliation:
University of Minnesota, Dept of Chemical Engineering and Materials Science, 421 Washington Ave.SE., Minneapolis, MN 55455
Get access

Abstract

The study of the type and strength of the filler-polymer linkages is of great importance in understanding the reinforcement of elastomers. Silicone rubbers are weak elastomers and the addition of reinforcing fillers is essential in order to obtain useful, strong materials. The best reinforcing filler for these elastomers are fumed silicas. These fillers, like reinforcing carbon blacks, have very complex structures. Both have fractal characteristics, small particles fused together forming open aggregates that can cluster by physical forces. Silicas have sometimes more complex structures than carbon blacks, but have a better understood surface chemistry. Interactions between polydimethylsiloxanes and silica surfaces have been studied using heat of adsorption measurements of mostly low molecular weight analogs or inferring the strength of the adsorption by the shift of particular peaks in the infrared spectrum [1]. Here we will present a new technique that measures directly the strength of the adsorption of the polymer segments onto glass and between themselves. It also allows for comparison of the strength of such bonds with the strength of a polymer entanglement “link”.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 170: Symposium N – Interfaces in Composites , 1989 , 303
Copyright
Copyright © Materials Research Society 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Brebner, K.I., Chahal, R.S., St-Pierre, L.E., Polymer, 21, 533 (1980).Google Scholar
2. Graessley, W.W. and Edwards, S.F., Polymer, 22, 1329 (1981).Google Scholar
3. Maxson, M.T. and Lee, L.J., Rubber Chem. Technol., 58, 436 (1982).Google Scholar
4. Berrod, G., Vidal, A., Papirer, E., Donnet, J.B., J. App. Polym. Sci., 26, (1981).Google Scholar
5. Aranguren, M., PhD thesis, University of Minnesota, 1989.Google Scholar
6. Cohen-Addad, J.P., Roby, C., Sauviat, M., Polymer, 26, 1231 (1985).Google Scholar
7. Mills, N.J., J. App. Polym. Sci., 15, 2791 (1971).Google Scholar
8. Israelachvili, J.N. and Adams, G.E., J.Chem.Soc.Faraday Trans. I., 3A, 975 (1978).Google Scholar
9. Thakkar, B., Watanabe, H., Tirrell, M., David, D.J., MRS Proceedings, N6.1 (1989).Google Scholar