| abstract |
The present invention describes the synthesis of new sulforated fluorinated elastomers having very low glass transition temperatures (T g ), a good resistance to bases, oils and fuels and good properties of workability. These elastomers contain, by way of example, from 80 to 60 mole % of vinylidene fluoride (VDF) and 20 to 40 mole % of perfluoro(4-methyl-3,6-dioxaoct-7-ene) sulfonyl fluoride (PFSO 2 F). In this case, they are prepared by radical copolymerisation of VDF and PFSO 2 F in the presence of different organic initiators, for example, peroxides, peresters or diazo compounds. |