Accession Number : ADA331712

Title :   Chemical Modification and Attempted Polymerization of Self-Assembled Monolayers of Hexadecanedioic Acid at Aluminum Surfaces.

Descriptive Note : Final rept. Oct 96-Mar 97

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Seger, Lawrence D. ; Rasimas, Jeffrey P. ; Pesce-Rodriquez, Rose ; Fifer, Robert

PDF Url : ADA331712

Report Date : NOV 1997

Pagination or Media Count : 34

Abstract : A self-assembled monolayer (SAM) of hexadecanedioic acid (HDDA) was prepared on an aluminum substrate for purposes of preventing or retarding the consequences of atmospheric corrosion. To enhance the protective qualities of the film, a scheme was developed to polymerize the exposed carboxylic acid functional groups, while enhancing the thickness of the film. To accomplish this, an attempt was made to cross-link the HDDA with octyltrichlorosilane (OTS). Subsequent experiments using a perfluorinated carboxylic acid as the base layer suggest that the OTS is aggressive enough toward the aluminum surface to completely remove the underlying organic SAM and displace it with siloxane (Si-O) linkages at the metal surface. Polarization modulated Fourier transform infrared absorption spectroscopy (PM-FTRIRRAS) and contact angle measurements confirm the displacement.

Descriptors :   *CHEMICAL PROPERTIES, *ALUMINUM, *CARBOXYLIC ACIDS, *ATMOSPHERIC CORROSION, ANGLES, METALS, MEASUREMENT, THICKNESS, LAYERS, MODIFICATION, DISPLACEMENT, FILMS, SUBSTRATES, SILOXANES, SURFACES, FLUORINATION, ACIDS.

Subject Categories : Inorganic Chemistry
      Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE