๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Water Dynamics in Ionomer Membranes by Field-Cycling NMR Relaxometry

โœ Scribed by J.-C. Perrin; S. Lyonnard; A. Guillermo; P. Levitz

Book ID
102214207
Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
279 KB
Volume
6
Category
Article
ISSN
1615-6846

No coin nor oath required. For personal study only.

โœฆ Synopsis

Abstract

The water dynamics of two types of ionomer membranes, the Nafion^ยฎ^ and sulfonated polyimides, have been investigated by fieldโ€cycling nuclear magnetic relaxation. This technique, applied to samples prepared at different water content, allows to characterize the proton motion at the time scale of the microsecond. The polyimides appear to behave as standard porous materials, whereas in the Nafion^ยฎ^, we have observed two different dynamical regimes related to a complex swelling process.

๐Ÿ“œ SIMILAR VOLUMES

Water dynamics in ionomer membranes by f
Water dynamics in ionomer membranes by field-cycling NMR relaxometry
โœ Jean-Christophe Perrin; Sandrine Lyonnard; Armel Guillermo; Pierre Levitz ๐Ÿ“‚ Article ๐Ÿ“… 2007 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 183 KB

The dynamic behavior of water within two types of ionomer membranes, Nafion and sulfonated polyimides, has been investigated by field-cycling nuclear magnetic relaxation. This technique, applied to materials prepared at different hydration levels, allows to probe the proton motion on a time scale of

Restricted Molecular Dynamics of Polymer
Restricted Molecular Dynamics of Polymer Chains by Means of NMR Field Cycling Relaxometry
โœ Sobiroh Kariyo; Siegfried Stapf ๐Ÿ“‚ Article ๐Ÿ“… 2005 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 201 KB

## Abstract **Summary:** The molecular dynamics of polymer melts with molecular weights above their critical values have been described by a power law dependence of the spinโ€lattice relaxation time on the Larmor frequency. Three different regimes of power laws describing the relaxation dispersion o