None of the materials you listed are fluorinated polymers. EDIT: If you meant that I cant turn PEEK into a plastic (as in having plasticity) - sure. But read

None of the materials you listed are fluorinated polymers. EDIT: If you meant that I cant turn PEEK into a plastic (as in having plasticity) - sure. But read my comment carefully. Im not saying fluorinated polymers don't have their use cases. Im just saying that for many (but not all!) applications of perfluorinated polymers, there are alternative ways of doing things. For example wool and stainless steel make excellent alternatives for jackets and frying pans. Should nuclear (re)processing plants ditch teflon when dealing with UF6? Probably not. Should my gas fittings need teflon tape? No, alternatives exist.