Controlled radical copolymerization of fluorinated monomers by xanthate or trithiocarbonate
AssigneesEcole Nationale Superieure De Chimie De Montpellier, Arkema France
InventorsBruno Ameduri, Yogesh Patil
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Abstract
The invention relates to a method of preparing a fluorinated copolymer, comprising a step of copolymerization of a fluorinated monomer (of the vinylidene fluoride type) with an α-trifluoromethacrylic acid monomer or derivative of α-trifluoromethacrylic acid, in the presence of a xanthate or trithiocarbonate compound. The invention also relates to copolymers obtained by this method as well as block copolymers comprising a copolymer block prepared according to this method.
Claims17
A method of preparing a copolymer, comprising a step of copolymerizating a vinylidene fluoride monomer with an α-trifluoromethacrylic acid monomer or derivative of α-trifluoromethacrylic acid, in the presence of a xanthate or trithiocarbonate compound, or mixtures thereof.
A copolymer of vinylidene fluoride and α-trifluoromethacrylic acid or derivative of α-trifluoromethacrylic acid, having a xanthate or trithiocarbonate termination.
A block copolymer having a block (a) copolymer of vinylidene fluoride and α-trifluoromethacrylic acid or derivative of α-trifluoromethacrylic acid, and a block (b) homopolymer.
A membrane comprising at least one copolymer or block copolymer selected from the group consisting of a copolymer of vinylidene fluoride and α-trifluoromethacrylic acid or derivative of α-trifluoromethacrylic acid, having a xanthate or trithiocarbonate termination, and a block copolymer having a block (a) copolymer of vinylidene fluoride and α-trifluoromethacrylic acid or derivative of α-trifluoromethacrylic acid, and a block (b) homopolymer.
A fuel cell device comprising at least one membrane according to claim 18.
Dependencies are inferred from the claim text.