From Minerals to Materials: A Facile Synthetic Route to Preceramic Polymers for Aluminum Oxide

Abstract

Reaction of boehmite, (Al(O)(OH)n, with an excess of carboxylic acid (HO2CR) results in the formation of the carboxy substituted alumoxanes, (Al(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 gamma-alumina.

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Document Details

Document Type
Technical Report
Publication Date
May 12, 1992
Accession Number
ADA250351

Entities

People

  • Allen W. Apblett
  • Andrew R. Barron
  • Christopher C. Landry
  • Mark W. Mason

Organizations

  • Harvard University

Tags

Communities of Interest

  • Advanced Electronics
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Carboxylic Acids
  • Chemical Compounds
  • Chemical Synthesis
  • Chemistry
  • Electron Microscopy
  • Films
  • Identities
  • Materials
  • Materials Science
  • Microscopes
  • Military Research
  • Particles
  • Physical Properties
  • Quantum Properties
  • Thin Films
  • United States

Readers

  • Combustion science or combustion engineering.
  • Polymer Science and Technology
  • Surface Coatings Technology.