Accession Number : ADA117814

Title :   Structure and Properties of Polymers and Organosilanes Adsorbed Onto Oxidized Aluminum and Titanium.

Descriptive Note : Interim rept. 1 Jul 81-30 Jun 82,

Corporate Author : CINCINNATI UNIV OH DEPT OF MATERIALS SCIENCE AND METALLURGICAL ENGINEERING

Personal Author(s) : Boerio,F James

PDF Url : ADA117814

Report Date : 01 Jul 1982

Pagination or Media Count : 35

Abstract : The structure of films formed by gamma-aminopropyltriethoxysilane (gamma-APS) adsorbed onto titanium, iron, and aluminum from aqueous solutions was determined and related to the effectivess of the silane as a primer for improving the hydrothermal stability of metal-to-metal adhesive joints. In all cases gamma-APS was adsorbed as highly hydrolyzed oligomers and then condensed during drying on the metal surface to form siloxxane polymers. However, the oxidized surfaces of aluminum and, to a slight extent, iron were etched in aqueous solutions of gamma-APS at pH 10.4, resulting in the inclusion of metal ions in the adsorbed films. Some evidence for the formation of aluminosiloxane polymers during adsorption of gamma-APS onto aluminum substrates at pH 10.4 was obtained.

Descriptors :   *Adhesive bonding, *Aluminum, *Titanium, *Iron, *Polymers, *Silanes, Thermal stability, Coatings, Primers, Siloxanes, Epoxy resins, Oxides, Films

Subject Categories : Polymer Chemistry
      Coatings, Colorants and Finishes
      Metallurgy and Metallography
      Fabrication Metallurgy
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE