Copolycondensation polymerization of fluoropolymers

3p2n2mp3264310 310 Fluorinated copolymers are prepared via copolycondensation polymerization in a process comprising reacting A) a telechelic fluoroazido compound of formula N(Y)-(CH)-R-(CH)-(Y)N, wherein Y is SO, SO, CH, or CO, p=0 or 1, n and m are independently 1 to 4, and R is selected from the group consisting of i) a C-Cfluoroalkylene group, ii) a C-Cfluoroalkoxylene group, iii) a substituted aryl group, iv) an oligomer comprising copolymerized units of vinylidene fluoride and perfluoro(methyl vinyl ether), v) an oligomer comprising copolymerized units of vinylidene fluoride and hexafluoropropylene, vi) an oligomer comprising copolymerized units of tetrafluoroethylene and perfluoro(methyl vinyl ether), and vii) an oligomer comprising copolymerized units of tetrafluoroethylene and a hydrocarbon olefin with B) a telechelic diyne or dinitrile compound in the presence of copper halide catalyst.