Journal
ACS MACRO LETTERS
Volume 6, Issue 10, Pages 1114-1118Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsmacrolett.7b00668
Keywords
-
Categories
Funding
- National Science Foundation [DMR1506824]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1506824] Funding Source: National Science Foundation
Ask authors/readers for more resources
Hydrated polyelectrolyte complexes, H-PECs, have recently started attracting renewed interest as a class of highly solvated/plasticized blends. H-PECs are observed to undergo a transition in mechanical properties close to room temperature. Whether this is a true glass transition has been questioned recently: the material has an unusually low modulus in the glassy state and molecular dynamics simulations have suggested temperature-induced dehydration and water structure changes are responsible for the transition. Using in situ infrared spectroscopic methods on thin films of a widely studied H-PEC we find no definitive evidence for changes in the hydration state of functional groups, the water content, or water structure on passing through T-g for stoichiometric and nonstoichiometric H-PECs. These complexes represent a promising platform for fundamental studies of the glass transition, since the coupling between chains can be modified by doping the material with salt, which breaks ion pairing cross-links. The Fox equation was used to estimate T(g)s for paired and unpaired oppositely charged repeat units.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available