Synthesis and copolymerisation of fluorinated monomers bearing a reactive lateral group ☆: Part 21. Radical copolymerisation of vinylidene fluoride with 2-hydroperfluorooct-1-ene

Abstract The synthesis and the radical copolymerisation of 2-hydroperfluorooct-1-ene (HPO) with vinylidene fluoride (VDF), initiated by tertio -butyl peroxypivalate (TBPPI) at 75 °C, are presented. That fluorinated alkene (HPO) was synthesised in two steps starting from the thermal or redox telomerisation of VDF with C 6 F 13 I (after purification of the monoadduct compound by rectification) followed by a dehydroiodination in the presence of various alkalies. Their influences are discussed toward the yield of the reaction. The compositions of the resulting random-type copolymers were calculated by means of 19 F NMR spectroscopy and allowed one to quantify the respective amounts of each monomeric unit in the copolymer. From the Tidwell and Mortimer method, the reactivity ratios ( r i ) of both comonomers for this copolymerisation were determined showing a higher incorporation of VDF: r VDF  = 12.0 ± 3.0 and r F 2 C CH C 6 F 13 = 0.9 ± 0.4 at 74 °C.