Method of Making a Fluoropolymer Dispersion Having a Low Amount of Perfluoroalkanoic Acids or Salts Thereof and the Fluoropolymer Comprises a Low Ionic End Group Ratio

A method of making a fluoropolymer, the method comprising:

• providing an aqueous mixture comprising a fluorinated monomer, and an initiator;
• polymerizing the aqueous mixture under free radical conditions;
• and
• adding perfluoromethyl iodide during the polymerization to provide an aqueous dispersion of the fluoropolymer,
• wherein the amount of perfluorooctanoic acid or salt thereof in the aqueous dispersion of the fluoropolymer is not more than 25 nanograms per gram of the fluoropolymer and the fluoropolymer has a Mooney viscosity (ML 1+10 at 121° C.) of from 10 to 100.