| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5186045 | Polymer | 2009 | 7 Pages |
Poly(ethylene glycol)s of all molecular weights are highly soluble in water. Small-Angle Neutron Scattering (SANS) data has been collected on buffered ionic D2O solutions of PEGs of nominal molecular weights 2000, 4000, and 8000Â Da at a low concentration of 0.5% (w/v). The radii of gyration Rg vary as approximately Mw0.5, which is consistent with both a Gaussian chain and a flat plate. Numerous types of experiments indicate flaws in the interpretation as a Gaussian chain. When the alternative interpretation is used, the structures in these dilute solutions are found to have a constant area stoichiometry of 1:1 water:-CH2CH2O- and are consistent with the data when monomeric molecules are plates of packed chains one chain thick.
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