[en] X-ray analysis techniques, such as small-angle x-ray scattering (SAXS), have been profitably applied in probing ionomer morphology for many years. We discuss below the application of two newer techniques, extended x-ray absorption fine structure (EXAFS) spectroscopy and anomalous SAXS (ASAXS), in two recent studies of ionomer morphology and structure-property relationships. The combination of SAXS and EXAFS was used to explain the modulus enhancement, due to interlocking loops of polymer chain, and high-strain behavior, due to aggregate cohesion, of five carboxy-telechelic polyisoprenes neutralized with divalent cations. ASAXS was used to show that the upturn near zero angle commonly observed in the SAXS patterns of ionomers is due to scattering from cations, possibly reflecting an inhomogeneous distribution of dissolved ionic groups.
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Register, Richard A.; University of Wisconsin, USA > Department of Chemical Engineering
Ding, Y. Samuel; University of Wisconsin, USA > Department of Chemical Engineering
Foucart, Marianne; Université de Liège - ULiège > Department of Chemistry > The Laboratory of Macromolecular Chemistry and Organic Catalysis
Jérôme, Robert ; Université de Liège - ULiège > Department of Chemistry > The Laboratory of Macromolecular Chemistry and Organic Catalysis
Hubbard, Stevan R.; University of Stanford, USA > Department of Chemistry and Department of Applied Physics
Hodgson, Keith O.; University of Stanford, USA > Department of Chemistry and Department of Applied Physics
Cooper, Stuart L.; University of Wisconsin, USA > Department of Chemical Engineering
Language :
English
Title :
X-ray-analysis of ionomers
Publication date :
21 July 1989
Main work title :
Multiphase polymers: blends and ionomers
Editor :
Utracki, L. A.
Weiss, R. A.
Publisher :
The American Chemical Society, Division Polymer Chemistry
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique The US department of energy SC Johnson & Son and the Fannie John Hertz foundation
