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Title: Investigation of polymer–solvent interactions in poly(styrene sulfonate) thin films

Journal Article · · Journal of Polymer Science. Part B, Polymer Physics
DOI:https://doi.org/10.1002/polb.24383· OSTI ID:1533209
 [1];  [1];  [1]
  1. Pennsylvania State Univ., University Park, PA (United States)

The swelling behavior of acid form poly(styrene sulfonate) (PSS-H) thin films were investigated using in situ spectroscopic ellipsometry (SE) to probe the polymer–solvent interactions of ion-containing polymers under interfacial confinement. The interaction parameter (χ), related to the polymer and solvent solubility parameters in the Flory–Huggins theory, describes the polymer-solvent compatibility. In situ SE was used to measure the degree of polymer swelling in various solvent vapor environments, to determine χ for the solvent-PSS-H system. The calculated solubility parameter of 40–44 MPa1/2 for PSS-H was determined through measured χ values in water, methanol, and formamide environments at a solvent vapor activity of 0.95. Flory–Huggins theory was applied to describe the thickness-dependent swelling of PSS-H and to quantify the water-PSS-H interactions. Confinement had a significant influence on polymer swelling at low water vapor activities expressed as an increased χ between the water and polymer with decreasing film thickness. Finally, as the volume fraction of water approached ~0.3, the measured χ value was ~0.65, indicating the water interacted with the polymer in a similar manner, regardless of thicknesses.

Research Organization:
General Motors LLC, Detroit, MI (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Fuel Cell Technologies Office; US Department of the Navy, Office of Naval Research (ONR); Corning Foundation; USDOE
Grant/Contract Number:
EE0000470; N00014-10-0875
OSTI ID:
1533209
Alternate ID(s):
OSTI ID: 1373819
Journal Information:
Journal of Polymer Science. Part B, Polymer Physics, Vol. 55, Issue 18; ISSN 0887-6266
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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