TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The electrolyte is nitric acid, aluminum nitrate, aluminum sulfate, calcium nitrate, zinc nitrate, zinc sulfate, calcium chloride, and magnesium sulfate.    TECHNOLOGY FOCUS - POLYMERS - Preparation (Claimed): Preparation of (I) from the polymerization latex comprises adding the latex under high shear stirring to an aqueous electrolyte solution held at a temperature equal to or lower than the glass transition temperature of the polymer. Preferred Components: (I) further comprises recurring units of at least one ethylenically unsaturated (per)fluorinated monomer (B). The monomer (A) is present in an amount such that the equivalent weight of the polymer when converted into its acid form is less than 750 g/equivalent (eq.). The equivalent weight is at least 400 g/eq. (I) a melt flow rate measured according to ASTM D1238-04 at 200 degrees C/5 kg, of less than 50 g/10 minute. The monomer (A) is perfuloro-5-sulfonylfluoride-3-oxa-1-pentene and monomer (B) is tetrafluoroethylene. Preferred Process: In the process, rate of stirring is such that the Reynolds number (Re1) of formula (p.N1.d12/ mu ). The incubation time is at least 5 seconds. The T1 is at least 0 degrees C and does not exceed 150 degrees C. The T2 is at least 5 degrees C lower than T1.p = density of water (kg/m3);N1 = number of revolutions per second of the impeller (1/s);d1 = diameter of the impeller (m); andmu (dynamic viscosity of water) = greater than 10000. EXAMPLE - Reactants comprising an aqueous solution (3100 g) containing 5 wt.% of a surfactant of formula (CF2ClO(CF2CF(CF3)O)p(CF2O)qCF2COOK), (where p/q = 10 (average molecular weight 527 g/mol)), and water (95 wt.%), deionized water (9 l), and perfuloro-5-sulfonylfluoride-3-oxa-1-pentene (756 ml) monomer was introduced in a reactor (22 l). The reactor was heated up to 60 degrees C, stirred at 540 rpm. The pressure inside the reactor was brought to 1.5 absolute MPa with a mixture of carbon dioxide and tetrafluoroethylene (TFE). The partial pressure of TFE inside the reactor was 0.41 MPa. Aqueous solution (300 ml) having a concentration of 35 g/l of potassium persulfate was fed into the reactor causing an increase in the pressure. The reaction started after 6 minutes as indicated by the lowering of the pressure within the reactor to its initial value. The reactor temperature was lowered to 50 degrees C. The pressure was maintained constant by introducing TFE. During the polymerization, perfuloro-5-sulfonylfluoride-3-oxa-1-pentene (160 ml) were added every 160 g of TFE. The total mass of TFE fed into the reactor was 3200 g. The reaction was stopped after 447 minutes by venting TFE and successively lowering the reactor pressure until reaching 0.03 absolute MPa. At the end of this operation, stirring was slowed down and the reactor brought to ambient pressure and temperature recovering a polymerization latex with a solid content of 31.6 wt.%. Then polymerization latex (250 g) were coagulated according to the general polymer isolation procedure and worked up to obtain the polymer having a weight loss at 200 degrees C of 0.3%, glass transition temperature of 13 degrees C, and melt flow rate (200 degrees C/5 kg) of 49.5 g/10 minutes.