Morphology and Chemical Properties of the Dow Perfluorosulfonate Ionomers,
Abstract
The Dow Chemical Company has developed an interesting ne w class of perfluorosulfonate ionomers (PFSI's). We have conducted a broad-based investigation of the supermolecular structures of these PFSI's. Small angle x-ray scattering data showed that the PFSI's contain ionic clusters. The sizes of these clusters vary with equivalent weight and water content. Wide-angle x-ray diffraction and differential scanning calorimetry demonstrated that PFSI's with equivalent weights greater than ca. 800 g/ mole are partially crystalline. The extent of crystallinity increases with equivalent weight. Surprisingly, the melting point of the Dow PFSI's varied only slightly with equivalent weight. This suggests that these are block-type copolymers. We have also developed dissolution and solution-casting procedures for a wide range of equivalent weights of these PFSI's Keywords: Fluorine compounds; Sulfonates; Polymers. (MJM)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1988
- Accession Number
- ADA207656
Entities
People
- Charles R. Martin
- Robert B. Moore Iii
Organizations
- Texas A&M University