Abstract
Interactions controlling the viscoelastic properties of Nafion are identified by investigating morphological changes induced through stretching at a wide range of controlled temperature and relative humidity. 2H-goniometer NMR exploiting the pseudonematic effect in D2O-containing membranes provides information on induced anisotropy on the 70 nm scale while small-angle X-ray scattering (SAXS) is used to reveal local structural correlations on the low nanometer scale. Under highly humidified conditions, stress is suggested to be mainly transmitted through the robust polymeric domain with shearing mainly occurring within the soft aqueous domain. Since the latter deteriorates the uniformity of the flat aqueous domain thickness, also the structural nanocorrelation decays. With decreasing relative humidity, where the weakly hydrated ionic domain is thought to form an increasingly stable Coulomb structure, and with increasing temperature reducing the elastic modulus of the polymeric domain, shearing is suggested...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
