Abstract
Thin films of 1H,1H,2H,2H-perfluorodecyl acrylate copolymerized with the cross-linker divinylbenzene (p(PFDA-co-DVB)) were synthesized via initiated chemical vapor deposition (iCVD). The vapor deposited approach is significant as the fluorinated monomer and hydrocarbon cross-linker lack a common solvent. Changes in physical and chemical properties in the copolymers before and after an annealing treatment were characterized by Fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), contact angle (CA) measurements with water and mineral oil, X-ray diffraction (XRD), and nanoindentation. Cross-linking results in lower CA hysteresis than measured for the iCVD p(PFDA) homopolymer. Furthermore, annealing improves the extent of reaction of the vinyl bonds on the DVB units incorporated into the film. This further enhancement in the cross-linking density is correlated with an additional reduction in the CA hysteresis observed after annealing of the p(PFDA-co-DVB) films. CA hysteresis values ...
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