Also Called: Poly(difluoromethylene), α,α'-[phosphinicobis( oxy-2,1-ethanediyl)]bis[ω-fluoro-, ammonium salt;Poly(difluoromethylene), α,α'-[phosphinicobis(oxy-2,1-ethanediyl)]bis[ω-fluoro-, ammonium salt;Poly(difluoromethylene), .alpha.,.alpha.'-[phosphinicobis(oxy-2,1-ethanediyl)]bis[.omega.-fluoro-, ammonium salt (1:1);Poly(difluoromethylene), _,_'-[phosphinicobis( oxy-2,1-ethanediyl)]bis[_-fluoro-, ammonium salt;Poly(difluoromethylene), .alpha.,.alpha.'-[phosphinicobis(oxy-2,1-ethanediyl)]bis[.omega.-fluoro-, ammonium salt;Poly(difluoromethylene), α,α'-[phosphinicobis(oxy-2,1-ethanediyl)]bis[ω-fluoro-, ammonium salt (1:1);Poly(difluoromethylene), a,a'-[phosphinicobis(oxy-2,1-ethanediyl)]bis[ω-fluoro-, ammonium salt;.alpha.,.alpha.'-[Phosphinicobis(oxy-2,1-ethanediyl)]bis[.omega.-fluoropoly(difluoromethylene)] ammonium salt;α,α'-[Phosphinicobis(oxy-2,1-ethanediyl)]bis[ω-fluoropoly(difluoromethylene)] ammonium salt;α,α'-[磷酸亚基(氧-2,1-亚乙基)]二[ω-氟]-聚(二氟亚甲基)铵盐