Solvents for fluorinated polymers

摘要

Perfluorinated cycloalkanes, perfluorinated aromatic compounds and perfluorotrialkyl amines having a critical temperature greater than 150 degrees C. are solvents for certain carboxylic fluorinated polymers having an equivalent weight greater than 900 and dissolve the polymers more readily and completely at low temperatures than previously known solvents. A process for dissolution of the polymers and the solutions that are formed is disclosed. The solutions are useful for making polymer films and ion exchange membranes, particularly membranes for use in chloroalkali cells or fuel cells.