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The dispersion and polymer coating of ultrafine aluminum powders by the Ziegler Natta reaction

Published online by Cambridge University Press:  01 February 2011

Cédric Roy ,
Charles Dubois ,
Pierre Lafleur  and
Patrick Brousseau
Cédric Roy
Affiliation:
Ecole Polytechnique de Montréal, Department of Chemical Engineering, Montréal, (Quebec), Canada. C.P.6079, Succ. Centre-Ville, Montréal, Quebec, H3C 3A7.
Charles Dubois
Affiliation:
Defense Research and Development Canada (DRDC), 2459 Pie XI, Blvd North, Val Belair, QC, G3J 1X5, Canada.
Pierre Lafleur
Affiliation:
Ecole Polytechnique de Montréal, Department of Chemical Engineering, Montréal, (Quebec), Canada. C.P.6079, Succ. Centre-Ville, Montréal, Quebec, H3C 3A7.
Patrick Brousseau
Affiliation:
Defense Research and Development Canada (DRDC), 2459 Pie XI, Blvd North, Val Belair, QC, G3J 1X5, Canada.
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Abstract

Ultrafine aluminum powders have been identified as very promising fuels as part of energetic materials formulations. However, the large specific surface area that gives these powders a high reactivity also makes them particularly difficult to maintain in an unoxidized state. They also agglomerate easily during compounding processes. The coating of the particles by a polymer could offer a solution to these problems. We carried out the in-situ synthesis of high density polyethylene on the surface of aluminum nanoparticles by the Ziegler-Natta process. The process was found to be flexible enough to control the amount of polyethylene grafted on the powders. Ultrasounds were applied during the polymerization process to enhance the dispersion of the particles in the solvent. The resulting characteristics of the coated powders are discussed by means of thermogravimetric characterizations and electronic microscopy.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 800: Symposium AA – Synthesis, Characterization, and Properties of Energetic/Reactive Nanomaterials , 2003 , AA2.5
Copyright
Copyright © Materials Research Society 2004

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References

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