Аннотация:It is demonstrated that perfluoro-4-fluorosulfonyl-phenyl-vinyl ether polymerizes at the pressure of 1.5-1.6 GPa and 190-225 °С temperature without any radical polymerization initiators. The resulting homopolymer contains ending FSO2- groups and thus could be of interest for the fabrication of proton-exchange membranes for hydrogen fuel cells.