Surface Chemistry of Fluorocarbons and their Derivatives

Nanoindentation of Films of Perfluorotridecyl, Perfluorodecyl, and Perfluoroheptyl End‐Functionalized Polystyrene at the Micron Scale

“…In agreement with the above, numerous polymers containing RF pendent‐ or end groups have been shown to exhibit mesogenic properties . In addition perfluorocarbons and RF groups have been shown to give exceptionally low‐surface free energies . The effects of hydrophobic/fluorophilic association of pendent RF groups on the rheological properties of aqueous polymer solutions, hydrogels, and nonaqueous polymer solutions have been demonstrated.…”

“…[32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51] In addition perfl uorocarbons and RF groups have been shown to give exceptionally low-surface free energies. [52][53][54][55][56] The effects of hydrophobic/fl uorophilic association of pendent RF groups on the rheological properties of aqueous polymer solutions, [ 24,25 ] hydrogels, [ 26,[57][58][59] and nonaqueous polymer solutions [ 60 ] have been demonstrated. In contrast, the potential of long perfl uorocarbon end groups to compatibilize homogeneous blends of low MW (≤20k) PS and polybutylmethacrylates (PBMA) through fl uorophilic interactions has only recently been demonstrated.…”

Relation of the Equilibrium Contact Angle to Liquid and Solid Constitution

“…A sufficiently large depression of the surface tension of water necessitates use of a soluble surface-active agent whose hydrophobic group is an appropriately fluorinated hydro carbon. Some of the properties of these rather "exotic" wetting agents have been reported by Scholberg, Guenthner, and Coon [89] and Klevens and Raison [68], The low surface energies of films of such compounds have been discussed by us [53]. Results of an investigation of aqueous solutions of such agents for wetting low-energy surfaces have been re ported with Bernett [14], A measure of wetting efficiency of interme diate value is the minimum solute concentration necessary to spread an aqueous solution on the surface of a single crystal of hexatriacontane (yc = 22 dynes per cm.).…”

Surface Chemistry of Fluorochemicals

“…Many applications of these new agents have been reported (57,58), and more new uses are being found rapidly. Low-energy solid surfaces such as the polypropylenes, fluorinecontaining plastics such as poly(vinyl fluoride), and various solids coated with a monolayer of a fatty acid (or derivative) or with a silicone have become increasingly more common.…”