The application of functional polymers containing short perfluorinated side chains could avoid the potential environmental damage caused by the use of compounds containing long perfluorinated side chains. Starting from perfluorobutyl sulfuryl fluoride, intermediate 4 with a hydroxy end group was obtained by sulfonylation and N-alkylation, then novel oxetane derivatives 1a and 1b with a nonafluorobu-tane-1-sulfonamide side chain were synthesized via Williamson etherification between 4 and 2,2-di(bromomethyl)oxetane (2). Similar procedure was applied to the preparation of hydantoin-oxetane monomer 6 using 5,5-dimethylhydantoin as starting material.

Key words: oxetane, perfluorobutylated sulfonamide, hydantoin, synthesis, characterization