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Title: Monomer volume fraction profiles in pH responsive planar polyelectrolyte brushes

Abstract

Spatial dependencies of monomer volume fraction profiles of pH responsive polyelectrolyte brushes were investigated using field theories and neutron reflectivity experiments. In particular, planar polyelectrolyte brushes in good solvent were studied and direct comparisons between predictions of the theories and experimental measurements are presented. The comparisons between the theories and the experimental data reveal that solvent entropy and ion-pairs resulting from adsorption of counterions from the added salt play key roles in affecting the monomer distribution and must be taken into account in modeling polyelectrolyte brushes. Furthermore, the utility of this physics-based approach based on these theories for the prediction and interpretation of neutron reflectivity profiles in the context of pH responsive planar polyelectrolyte brushes such as polybasic poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) and polyacidic poly(methacrylic acid) (PMAA) brushes is demonstrated. The approach provides a quantitative way of estimating molecular weights of the polymers polymerized using surface-initiated atom transfer radical polymerization.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1240518
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Polymer Science. Part B, Polymer Physics
Additional Journal Information:
Journal Name: Journal of Polymer Science. Part B, Polymer Physics; Journal ID: ISSN 0887-6266
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Mahalik, Jyoti P., Yang, Yubo, Deodhar, Chaitra V., Ankner, John Francis, Lokitz, Bradley S., Kilbey, II, S. Michael, Sumpter, Bobby G., and Kumar, Rajeev. Monomer volume fraction profiles in pH responsive planar polyelectrolyte brushes. United States: N. p., 2016. Web. doi:10.1002/polb.24008.
Mahalik, Jyoti P., Yang, Yubo, Deodhar, Chaitra V., Ankner, John Francis, Lokitz, Bradley S., Kilbey, II, S. Michael, Sumpter, Bobby G., & Kumar, Rajeev. Monomer volume fraction profiles in pH responsive planar polyelectrolyte brushes. United States. https://doi.org/10.1002/polb.24008
Mahalik, Jyoti P., Yang, Yubo, Deodhar, Chaitra V., Ankner, John Francis, Lokitz, Bradley S., Kilbey, II, S. Michael, Sumpter, Bobby G., and Kumar, Rajeev. Sun . "Monomer volume fraction profiles in pH responsive planar polyelectrolyte brushes". United States. https://doi.org/10.1002/polb.24008. https://www.osti.gov/servlets/purl/1240518.
@article{osti_1240518,
title = {Monomer volume fraction profiles in pH responsive planar polyelectrolyte brushes},
author = {Mahalik, Jyoti P. and Yang, Yubo and Deodhar, Chaitra V. and Ankner, John Francis and Lokitz, Bradley S. and Kilbey, II, S. Michael and Sumpter, Bobby G. and Kumar, Rajeev},
abstractNote = {Spatial dependencies of monomer volume fraction profiles of pH responsive polyelectrolyte brushes were investigated using field theories and neutron reflectivity experiments. In particular, planar polyelectrolyte brushes in good solvent were studied and direct comparisons between predictions of the theories and experimental measurements are presented. The comparisons between the theories and the experimental data reveal that solvent entropy and ion-pairs resulting from adsorption of counterions from the added salt play key roles in affecting the monomer distribution and must be taken into account in modeling polyelectrolyte brushes. Furthermore, the utility of this physics-based approach based on these theories for the prediction and interpretation of neutron reflectivity profiles in the context of pH responsive planar polyelectrolyte brushes such as polybasic poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) and polyacidic poly(methacrylic acid) (PMAA) brushes is demonstrated. The approach provides a quantitative way of estimating molecular weights of the polymers polymerized using surface-initiated atom transfer radical polymerization.},
doi = {10.1002/polb.24008},
journal = {Journal of Polymer Science. Part B, Polymer Physics},
number = ,
volume = ,
place = {United States},
year = {Sun Mar 06 00:00:00 EST 2016},
month = {Sun Mar 06 00:00:00 EST 2016}
}

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Cited by: 25 works
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