70776-76-0 Acetic acid, (1-(difluoro((trifluoroethenyl)oxy)methyl)-1,2,2,2-tetrafluoroethoxy)difluoro-, polymer with tetrafluoroethene Difluoro(trifluoro-1-(trifluoromethyl)-2-((trifluorovinyl)oxy)ethoxy)acetic acid, tetrafluoroethylene polymer