Surface Segregation of Fluorine-Ended Monomers

✍ Scribed by M.G.D. van der Grinten; A.S. Clough; T.E. Shearmur; R. Bongiovanni; A. Priola

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 120 KB
• Volume: 182
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0495

✦ Synopsis

tion (1% w/w) before coating several different substrates Rutherford backscattering (RBS) and contact angle measurewith it. Rutherford backscattering (RBS) and contact angle ments were used to study surface segregation in polymeric films. measurements give information about the wettability and the The films consisted of the UV-curable resin 4,4-isopropylidenedisurface tension of the films and show that, despite the low phenylethoxy diacrylate to which the fluorinated acrylic monomer bulk concentration of the fluorinated monomer, the material 2-(N-butylperfluorooctanesulfonamido) ethylacrylate was added.

is highly hydrophobic, protecting against scratching and

The resins were coated on a quartz substrate and on a high density graffiti in the same way that pure fluorinated products do.

polyethylene substrate which have different polarities and surface

The modification can be selectively performed on either side tensions. The fluorinated monomer is shown to segregate to the of the film and, at the same time depending on the curing surface, which creates a hydrophobic surface. When an apolar substrate is used the monomer enriches both interfaces, while if a conditions, the adhesive property of the original acrylic syspolar substrate is used the monomer preferentially enriches the tem toward the substrate can be maintained. air interface.