- Title
- Conformation of poly(ethylene oxide) dissolved in ethylammonium nitrate
- Creator
- Werzer, Oliver; Warr, Gregory G.; Atkin, Rob
- Relation
- The Journal of Physical Chemistry Part B Vol. 115, Issue 4, p. 648-652
- Publisher Link
- http://dx.doi.org/10.1021/jp110216k
- Publisher
- American Chemical Society
- Resource Type
- journal article
- Date
- 2011
- Description
- Small angle neutron scattering has been used to investigate the morphology of 38 kDa PEO dissolved in ethylammonium nitrate (EAN) in the dilute and semidilute concentration regions. At infinite dilution, the radius of gyration, Rg, is 8.1 nm. This value decreases through the dilute regime according to a concentration (c) dependence of Rg ≈ c-0.24, while above the overlap concentration a c-1 dependence is followed. These values differ from aqueous solution behavior, which we attribute to EAN being a poorer solvent for PEO than water; EAN is in fact close to a θ solvent. The polymer structure on length scales less than 3 nm is unaffected by increasing polymer concentration, suggesting that the overall decrease in coil dimensions is a consequence of tighter packing of ~3 nm polymer “blobs” into a smaller volume.
- Subject
- aqueous solutions; coil dimensions; polymer concentrations; small angle neutron scattering; neutron scattering; polymers
- Identifier
- http://hdl.handle.net/1959.13/1039835
- Identifier
- uon:13707
- Identifier
- ISSN:1520-6106
- Rights
- This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry Part B, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/jp110216k
- Language
- eng
- Full Text
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