Small-angle scattering study of short pendant chain perfuorosulfonated ionomer membranes

被引:141
作者
Gebel, G
Moore, RB
机构
[1] CEA Grenoble, Dept Rech Fondamentale Mat COndensee, Grp Polymeres Conducteurs Ion SI3M, F-38054 Grenoble 9, France
[2] Univ So Mississippi, Dept Polymer Sci, Hattiesburg, MS 39406 USA
关键词
D O I
10.1021/ma9912709
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A structural study using both small-angle X-ray and neutron scattering (SAXS and SANS) of dry and water-swollen short pendant side chain perfluorosulfonated ionomer (SPC PFSI) membranes is presented. The SAXS and SANS profiles are shown to be equivalent, confirming the phase separation between the water and the perfluorinated matrix. The study of the asymptotic behavior at large angles of the scattering curves confirms that the structure is dominated by the polymer-solvent interfacial energy. The local order model is shown to satisfactorily reproduce the scattering profiles obtained for SPC PFSI membranes depending on the equivalent weight (EW) with a low number of free parameters. However, the values of the parameters for large EWs are not in agreement with those determined from the Pored analysis due to the presence of a well-defined maximum at low q values. This maximum, attributed to a crystalline component, slightly modifies both the position and the intensity of the ionomer peak. For the low EW membrane, which generates a very large water uptake, we propose to describe the swollen membrane as a connected network of rods.
引用
收藏
页码:4850 / 4855
页数:6
相关论文
共 22 条
  • [1] Coulter M.O., 1980, MODERN CHLOR ALKALI
  • [2] DISTRIBUTION OF THE MICELLES IN HYDRATED PERFLUORINATED IONOMER MEMBRANES FROM SANS EXPERIMENTS
    DREYFUS, B
    GEBEL, G
    ALDEBERT, P
    PINERI, M
    ESCOUBES, M
    THOMAS, M
    [J]. JOURNAL DE PHYSIQUE, 1990, 51 (12): : 1341 - 1354
  • [3] DREYFUS B, 1987, NATO ASI SER, V198, P27
  • [4] Eisenberg A., 1982, PERFLUORINATED IONOM, V180
  • [5] SMALL-ANGLE X-RAY-SCATTERING STUDY OF PERFLUORINATED IONOMER MEMBRANES .1. ORIGIN OF 2 SCATTERING MAXIMA
    FUJIMURA, M
    HASHIMOTO, T
    KAWAI, H
    [J]. MACROMOLECULES, 1981, 14 (05) : 1309 - 1315
  • [6] STRUCTURE AND RELATED PROPERTIES OF SOLUTION-CAST PERFLUOROSULFONATED IONOMER FILMS
    GEBEL, G
    ALDEBERT, P
    PINERI, M
    [J]. MACROMOLECULES, 1987, 20 (06) : 1425 - 1428
  • [7] Small-angle scattering study of water-swollen perfluorinated ionomer membranes
    Gebel, G
    Lambard, J
    [J]. MACROMOLECULES, 1997, 30 (25) : 7914 - 7920
  • [8] Structural evolution of water swollen perfluorosulfonated ionomers from dry membrane to solution
    Gebel, G
    [J]. POLYMER, 2000, 41 (15) : 5829 - 5838
  • [9] Gebel G., 1996, IONOMERS CHARACTERIZ, P83
  • [10] THE MORPHOLOGY IN NAFION PERFLUORINATED MEMBRANE PRODUCTS, AS DETERMINED BY WIDE-ANGLE AND SMALL-ANGLE X-RAY STUDIES
    GIERKE, TD
    MUNN, GE
    WILSON, FC
    [J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1981, 19 (11) : 1687 - 1704