Abstract: The invention relates to a polymer comprising at least one polymeric chain of a first type, the said chain comprising at least two blocks, the same or different, the said blocks comprising repeat units derived from the polymerisation of styrene monomers, the said units comprising at least one phenyl pendant group carrying at least one —SO3R group, R possibly being a hydrogen atom, an alkyl group or cationic counter-ion, the said two blocks being separated by a spacer group, the spacer group is a perfluorocarbon group.

Abstract: The invention relates to a method for preparing a compound comprising at least one ?-hydroxy-urethane unit and/or at least one ?-hydroxy-urethane unit, consisting in reacting a compound (A) comprising at least one cyclocarbonate reactive unit with a compound (B) comprising at least one amino reactive unit (—NH2) in the presence of a catalyst. The invention also relates to the use of a catalyst comprising at least one organometallic complex and a co-catalyst chosen from the group of Lewis bases and/or tetra-alkyl ammonium salts, in order to catalyse the method of the invention. The invention relates to the technical field of preparing urethane derivatives.

Abstract: A fluorinated copolymer including at least one recurrent unit of the following formula (I): and at least one recurrent unit of the following formula (II): in which: RF represents a perfluorocarbon chain optionally including one or more oxygen atoms; X represents a halogen atom, OR with R representing a hydrogen atom or a cation; R1 represents a hydrocarbon chain or perfluorocarbon chain; and Z represents a perfluorocarbon chain.

Abstract: Fluorinated copolymers are prepared via copolycondensation polymerization in a process comprising reacting A) a telechelic fluoroazido compound of formula N3(Y)p—(CH2)n—R—(CH2)m—(Y)pN3, wherein Y is SO, SO2, C6H4, 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 C3-C10 fluoroalkylene group, ii) a C3-C10 fluoroalkoxylene 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.

Abstract: A fluorinated copolymer including at least one recurrent unit of the following formula (I): and at least one recurrent unit of the following formula (II): in which: RF represents a perfluorocarbon chain optionally including one or more oxygen atoms; X represents a halogen atom, OR with R representing a hydrogen atom or a cation; R1 represents a hydrocarbon chain or perfluorocarbon chain; and Z represents a perfluorocarbon chain.

Abstract: Fluorinated copolymers are prepared via copolycondensation polymerization in a process comprising reacting A) a telechelic fluoroazido compound of formula N3(Y)p—(CH2)n—R—(CH2)m—(Y)pN3, wherein Y is SO, SO2, C6H4, 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 C3-C10 fluoroalkylene group, ii) a C3-C10 fluoroalkoxylene 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.