Fluorinated ionomers

   
   

Semicrystalline sulphonic fluorinated ionomers having an equivalent weight higher than 700 g/eq, up to 1,700, comprising: (A) monomeric units deriving from one or more fluorinated monomers containing at least one ethylene unsaturation; (B) fluorinated monomeric units containing sulphonyl groups --SO.sub.2 F in such amount to give the above equivalent weight, deriving from F.sub.2 C.dbd.CF--O--(CF.sub.2).sub.q --SO.sub.2 F, q being an integer equal to 2 or 3; and having the following properties for a TFE/(B) copolymer: hydration, expressed in % of H.sub.2 O at 100.degree. C. absorbed by the film prepared from the ionomer and after tranformation from the --SO.sub.2 F form into the --SO.sub.3 H form, having the following values:

        at      750 EW    higher than   55%,    pref.   >70%
        at      850 EW         "        45%,      "     >55%
        at    1,000 EW         "        35%,      "     >40%
        at    1,100 EW         "        28%,      "     >32%
        at    1,200 EW         "        23%,      "     >25%.

Иономеры Semicrystalline сульфоновые fluorinated имея соответствующий вес высоки чем 700 g/eq, up to 1.700, состоя из: (A) односегментные блоки выводя от one or more fluorinated мономеров содержа по крайней мере один unsaturation этилена; (B) fluorinated односегментными блоками содержа sulphonyl собирают -- SO.sub.2 ф в таком количестве для того чтобы дать вышеуказанный соответствующий вес, выводя от F.sub.2 C.dbd.CF -- о -- (CF.sub.2).sub.q -- SO.sub.2 ф, ц интежер равный до 2 или 3; и имеющ following свойства для TFE/(B) сополимера: оводнение, выраженное в % H.sub.2 о на 100.degree. C поглощенное пленкой подготовило от иономера и после tranformation от -- форма SO.sub.2 ф в -- формы SO.sub.3 ю, имеющ following значения: на 750 ew более высоко чем 55%, pref. 70% на 850 ew "45%," 55% на 1.000 ew "35%," 40% на 1.100 ew "28%," 32% на 1.200 ew "23%," 25%.

 
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