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From Minierals to Materlals: A Facile Synthetic Route to Preceraic Polymers for Aluminum Oxide

  • Allen W. Apblett (a1), Christopher C. Landry (a1), Mark R. Mason (a1) and Andrew R. Barron

Abstract

Reaction of boehmite, [AI(O)(OH)]n, with an excess of carboxylic acid (HO2CR) results in the formation of the carboxy substituted alumoxanes, [AI(O)x(OH)y(O2CR)z)]n where 2x + y + z = 3 and R = alkyl substituents. The alumoxanes have been fully characterized by SEM, elemental analysis, IR and multinuclear NMR spectroscopy. The physical properties of the alumoxanes are highly dependent on the identity of R, and range from insoluble crystalline powders, e.g. R = CH3, to powders which readily form solutions or gels in hydrocarbon solvents, e.g. R = C5H11. All of the alumoxanes decompose under mild thermolysis to yield γ-alumina.

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1 See for example: (a) Better Ceramics Through Chemistry IV, edited by Zelinski, B.J.J., Brinker, C.J., Clark, D.E., and Ulrich, D.R., (Mater. Res. Soc. Proc. 180, Pittsburgh, PA 1990). (b) Chemical Perspectives of Microelectronic Materials II, edited by L.V. Interrante, K.F. Jensen, L. H. Dubois and M.E. Gross. (Mater. Res. Soc. Proc. 204, Pittsburgh, PA 1991).
2 (a) Kimura, Y., Sugaya, S., Ichimura, T., and Taniguchi, I., Macromolecules, 20, 2329 (1987) (b) Y. Kimura, M. Furukawa, H. Yamane and T. Kitao, Macromolecules, 22, 79 (1989)
3 Rees, W. S. Jr., and Hesse, W., Mat. Res. Soc. Symp. Proc., 204, 563 (1991)
4 (a) Kimura, Y., Nishimura, A., Shimooka, T., and Taniguchi, I., Makromol. Chem., Rapid Commun., 6, 247 (1985). (b) Y. Kimura, S. Tanimoto, H. Yamane, and T. Kitao, Polyhedron, 9, 371 (1990)
5 Apblett, A.W., Warren, A.C., and Barron, A.R., Chem. Mater., in press
6 Carruthers, J.D., personal communication

From Minierals to Materlals: A Facile Synthetic Route to Preceraic Polymers for Aluminum Oxide

  • Allen W. Apblett (a1), Christopher C. Landry (a1), Mark R. Mason (a1) and Andrew R. Barron

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