From Minerals to Materials: A Facile Synthetic Route to Preceramic Polymers for Aluminum Oxide
HARVARD UNIV CAMBRIDGE MA DEPT OF CHEMISTRY
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Reaction of boehmite, AlOOHn, with an excess of carboxylic acid HO2CR results in the formation of the carboxy substituted alumoxanes, AlO xOHyO2CRzn 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 gamma-alumina.
- Inorganic Chemistry
- Polymer Chemistry
- Geology, Geochemistry and Mineralogy
- Ceramics, Refractories and Glass