Accession Number : ADA207656

Title :   Morphology and Chemical Properties of the Dow Perfluorosulfonate Ionomers,

Corporate Author : TEXAS A AND M UNIV COLLEGE STATION DEPT OF CHEMISTRY

Personal Author(s) : Moore, Robert B , III ; Martin, Charles R

PDF Url : ADA207656

Report Date : Jan 1988

Pagination or Media Count : 29

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)

Descriptors :   *FLUORINE COMPOUNDS, *POLYMERS, *SULFONATES, CALORIMETRY, CHEMICAL PROPERTIES, CRYSTALS, MELTING POINT, MOISTURE CONTENT, RANGE(EXTREMES), SCANNING, WEIGHT, WIDE ANGLES, X RAY DIFFRACTION

Subject Categories : Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE