NEW PERFLUOROPOLYMERS BEARING DIALKYLAMINO GROUPS AS SIDE-CHAINS

New perfluorovinyl monomers such as perfluorovinylamines, perfluoroall ylamines and perfluorovinyl ethers bearing a dimethylamino, pyrrolidin o, morpholino or piperidino group were subjected to copolymerization. Whereas perfluorovinylamines and perfluoroallylamines copolymerized on ly with vinylidene fluoride, the radical copolymerization of perfluoro vinyl ethers and tetrafluoroethylene afforded copolymers that could be fabricated into films and had high thermal stability and gas permeabi lity. These copolymers bearing cyclic amino groups as side chains were reacted with fuming sulfuric acid and then hydrolysed to give perfluo ropolymers bearing carboxyl groups, which showed improved wettability.