A series of novel polymers have been prepared by free radical
solution polymerization of a
variety of hydrocarbon monomers with the (perfluoroalkyl)ethyl
methacrylate monomer
H2CC(CH3)CO2(CH2)2(CF2)
n
F,
1 (n̄ ≈ 7.7). Polymers prepared using
two different methods of feeding 1 into the
reaction mass are discussed. Through a judicious choice of
reaction conditions, some control of polymer
architecture was exhibited. The resultant
(perfluoroalkyl)ethyl methacrylate-containing acrylic
polymers
were shown to be quite surface active in the solid state. The
magnitude of surface activity depends on
the monomer 1 feed method. The polymers were formulated
into thin films and applied to a variety of
surfaces. With levels at 1.5 wt % of 1, water and oil
repellent surfaces were created. Water contact
angles (advancing) of ∼80−115° and hexadecane contact angles
(advancing) of ∼60−70° were observed
routinely. In addition, it was observed that the concentration
profile of fluorine in the films exhibited a
steep gradient normal to the surface when studied by angle-dependent
ESCA and secondary ion mass
spectroscopic depth profiling.
Aus dem ungesättigten Carbinol (Ia) entstehen die Halogenverbindungen (Ib) und (Ic) nur intermediär, es tritt eine sofortige Dehydrohalogenierung zum Dien (II) ein.
Diethylmalonsäure (I) liefert das cy clische Peroxid (II), analog entsteht (III); aus dem spirocyclischen Cyclohexanon (IV) erhält man mit Tosylmethylisocyanid und KOH eine Carbonsäure (V), deren weitere Carboxylierung zur Dicarbonsäure (VI) und derem cyclischen Peranhydrid (VII) führt.
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