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SANS from Poly(ethylene oxide)/Water Systems
Abstract
The poly(ethylene oxide) (PEO)/water system is investigated using small-angle neutron scattering (SANS). This system associates to form hydrogen-bonded clusters at high enough concentrations. Two correlation lengths are observed: one long range representing cluster sizes and the other short range representing polymer chain correlations. Clusters are formed at a volume fraction of 4% hPEO in D 2 O. An LCST transition is obtained between a mixed phase (through hydrogen bonding) and a demixed two-phase region. Solvent deuteration is seen to enhance hydrogen bonding. Deuteration of the polymer backbone is seen to enhance hydrophobic interactions. The average polymer contrast match method fails due to the isotopic dependence of specific interactions. Pressure was seen to lower the LCST by breaking hydrogen bonds. At even higher temperature (beyond the boiling point of water) a UCST transition was observed.
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Cited by
Insight into Clustering in Poly(ethylene oxide) Solutions
Hammouda, B., Ho, D. L., & Kline, S. (2004) · Macromolecules · doi:10.1021/ma049623d · Cited by 437
Self-citationPlamper, F. A., McKee, J. R., Laukkanen, A., Nykänen, A., Walther, A., Ruokolainen, J., Aseyev, V., & Tenhu, H. (2009) · Soft Matter · doi:10.1039/b822143j · Cited by 74
Metadata
- Authors
- Hammouda, B., Ho, D., & Kline, S.
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2002-09-25
- Volume
- 35
- Issue
- 22
- Pages
- 8578-8585
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W2034382660
- Cited by
- 194
- References
- 0
- FWCI
- 4.64
- Type
- journal article
- Language
- en
- Open access
- closed
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