Abstract
Oil soluble surface active substances,(HFPO) n-Ar, where Ar is an aryl group and (HFPO) n is an oligo(hexafluoropropene oxide) group, n = 2 − 5, were prepared and tested for their surface activities in toluene or m -xylene. Addition of a small amount of (HFPO) 4–6-Ar (0.2–0.5 wt%) was found to decrease remarkably the surface tension of these solvents (down to 12–14 dyn·cm −1 at 20 °C). Water soluble surfactants (HFPO) n-Ar′SO 3Na, where Ar′ is an arylene group, were also prepared by sulfonation of (HFPO) n-Ar. Some of these substances (n = 4 − 6) decreased the surface tension of water down to 16 dyn·cm −1 at 20 °C in the concentration of 1O −4–1O −5 mole·1 −1.
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