The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
Effect of Free Volume on Water and Salt Transport Properties in Directly Copolymerized Disulfonated Poly(arylene ether sulfone) Random Copolymers
Abstract
The influence of cation form and degree of sulfonation on free volume, as probed via positron annihilation lifetime spectroscopy (PALS), and water and salt transport properties was determined in a systematic series of directly copolymerized disulfonated poly(arylene ether sulfone) random copolymers. Polymer samples were studied in both the dry and hydrated states. PALS-based estimates of free volume in the dry polymers were compared with those estimated using density and the Bondi group contribution method, and PALS-based free volume data for hydrated polymers were correlated with water and salt transport properties. The transport properties depend strongly on free volume cavity size. Samples with larger free volume elements have higher water and salt solubility, diffusivity, and permeability and lower water/salt diffusivity and permeability selectivity. Sorption of water alters the characteristic free volume of the polymer matrix by two competing mechanisms: water molecules partially occupy the original free volume in the initially dry polymer, thereby reducing free volume cavity size, and water swells the polymer matrix therefore increasing the mean free volume size as a result of increased polymer chain plasticization. The importance of the second effect increases as water uptake and, thus, plasticization increases.
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Cites
Phenomenological Theory of Ion Solvation. Effective Radii of Hydrated Ions
Nightingale, E. R. (1959) · The Journal of Physical Chemistry · doi:10.1021/j150579a011 · Cited by 3,505
Transport and structural characteristics of crosslinked poly(ethylene oxide) rubbers
LIN, H., WAGNER, E., SWINNEA, J., FREEMAN, B., PAS, S., HILL, A., KALAKKUNNATH, S., & KALIKA, D. (2006) · Journal of Membrane Science · doi:10.1016/j.memsci.2005.09.040 · Cited by 327
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Metadata
- Authors
- Xie, W., Ju, H., Geise, G. M., Freeman, B. D., Mardel, J. I., Hill, A. J., & McGrath, J. E.
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-05-12
- Volume
- 44
- Issue
- 11
- Pages
- 4428-4438
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W2071025690
- Cited by
- 159
- References
- 2
- FWCI
- 19.80
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Effect of Free Volume on Water and Salt Transport Properties in Directly Copolymerized Disulfonated Poly(arylene ether sulfone) Random Copolymers. https://app.cochat.ai/papers/10.1021/ma102745s
- The paper
- Xie, W., Ju, H., Geise, G. M., Freeman, B. D., Mardel, J. I., Hill, A. J., & McGrath, J. E. (2011). Effect of Free Volume on Water and Salt Transport Properties in Directly Copolymerized Disulfonated Poly(arylene ether sulfone) Random Copolymers. Macromolecules. https://doi.org/10.1021/ma102745s
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