The Structure of Films of Silane Primers on Aluminium Substrates

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Abstract
Specular reflectance infra-red spectroscopy has been used to elucidate the structure of thin films of silane coupling agents on aluminium. Changes in the hydroxyl absorption band at 3400 cm−1 were linked to thickness changes and to increasing hydrogen bonding and chelation. This suggests chemical bonds linking silane and metal. Only with the thinnest films is hydroxyl bonding dominant and able to influence the coherence of the silane film.