Synthesis and Modification of Alternating Copolymers Based on Vinyl Ethers, Chlorotrifluoroethylene, and Hexafluoropropylene

Fluorinated copolymers bearing ammonium groups were prepared by radical copolymerization of fluorinated olefins (chlorotrifluoroethylene, hexafluoropropylene) with different vinyl ethers (2-chloroethyl, cyclohexyl, n-butyl, and ethyl vinyl ethers) followed by the cationization of these copolymers with trimethylamine. Copolymers were obtained in high yield (generally > 85 %), with molecular weights ranging from 8,000 to 25,000 g.mol -1 . From elemental analysis, 1 H and 19 F NMR spectroscopy, the alternating structure of these polymers was confirmed. The chemical modification of these copolymers consisted in a two-step reaction: (i) the replacement of the chlorine atom by an iodine atom followed by (ii) the substitution of the halogen atom by the trimethylamine into a quaternary ha l-0 04 47 58 9, v er si on 1 18 J an 2 01 0