Synthesis and Properties of Polymers Based on Oligo(hexafluoropropene oxide) Containing Methacrylates and Copolymers with Methyl Methacrylate

Abstract

Three series of methacrylate homopolymers with oligo(hexafluoropropene oxide), (HFPO)n, side groups and copolymers based on methyl methacrylate were prepared by free radical polymerization. Each series consisted of a polymethacrylate backbone with substituted HFPO side chains of different length ranging from the corresponding tri-and tetramers to a pentamer. In case of the (HFPO)3MA copolymers, glass transition temperatures decreased linearly with increasing (HFPO)3MA content over the entire composition range. In contrast, two different regimes were distinguished for (HFPO)5MAcontaining copolymers, and also for the (HFPO)4MA homopolymer two Tg's were discerned. At low HFPO content the glass transition temperatures decreased with increasing (HFPO)5MA substitution. Above 50 mol % two glass transitions were observed, indicating microphase separation. Copolymers with only 10 mol % of (HFPO)nMA exhibited a low surface energy as is typical for highly fluorinated polymers. Dispersion force surface energies were determined by the Good-Girifalco-Fowkes-Young method and resulted in a minimum value of 11 ( 1 mN/m.

Preparation and Properties of Poly(urethane-urea) Crosslinked Coatings from Perfluorocopolyethers and Polyfunctional Isocyanurates

“…Structures bearing 1CF 3 groups closely packed at the polymer-air interface like (meth)acrylic copolymers with perfluoroalkyl pendent groups [33] show the minimum c s values known in the field of organic polymers, of the order of 11-12 mN/m. In particular, PFPE containing linear methacrylate polymers, having the fluorinated segments grafted to a main hydrocarbon chain, [34] show a dependence of c s d on the length of fluoroether segment and overall fluorine content of the polymer (c s d = 11-24 mN/m).…”

Synthesis and Surface Properties of Environmentally Responsive Segmented Polyurethanes

“…Fluorine has also been introduced into coating formulations by cross-linking siloxane with a fluoropolymer (9) or by casting a thin fluorocarbon film onto a silicone-coated substrate (10)(11)(12). Polymers containing lowenergy perfluoropolyethers (13)(14)(15)(16)(17)(18)(19)(20)(21)(22) (PFPE) and perfluoroalkyl groups (23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) (R f ) have also been explored for low adhesion 1 To whom correspondence should be addressed. and solvent repellency applications.…”

Synthesis and properties of UV-curable polyurethane acrylates containing fluorinated acrylic monomer/vinyltrimethoxysilane

“…Acrylic copolymers containing perfluoroalkyl side chains have been the focus of many studies, because of the good reactivity of perfluorinated acrylate with fluorine-free acrylate and good adhesion to the matrices [13][14][15]. The fluorinated side groups in fluorinated acrylic copolymers have emerged preferentially at the coating-air surface [16][17][18][19][20]. Fluorinated acrylic copolymer films not only retain the original properties of polyacrylate films, such as good adhesion to the matrix, but also have better durability as well as good antifouling property.…”