| abstract |
The present invention describes the synthesis of new fluorinated elastomers with very low glass transition temperatures (T g ), a good resistance to bases, gasoline and other carburants and good workability properties, these elastomers contain hexafluoropropene (HFP), perfluoro(4-methyl-3,6-dioxaoct-7-ene) sulfonyl fluoride (PFSO 2 F), vinylidene fluoride (VDF) and/or at least one fluorinated alkene and/or one vinyl perfluorinated ether. In a precise case, they are prepared by radical polymerisation of HFP and PFSO 2 F or by radical terpolymerisation HFP, PFSO 2 F and VDF in the presence of different organic initiator, such as peroxides, peresters or diazo compounds. |