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• W2323255005 startingPage "10725" @default.
• W2323255005 abstract "Aqueous formulations containing polymers and surfactants find several applications in pharmaceutics, coatings, inks, and home products. The association between polymers and surfactants contributes greatly to the function of these complex fluids, however, the effects of polar organic solvents, ubiquitous in formulations, remain mostly unexplored. We have analyzed small angle neutron scattering (SANS) data to determine the conformation of a “model” nonionic polymer, poly(ethylene oxide) (PEO), in aqueous solutions as affected by the presence of an ionic surfactant, sodium dodecyl sulfate (SDS), and subsequent addition of short-chain alcohol (ethanol or 2-propanol). PEO chains (MW = 90 000) are Gaussian in dilute aqueous solutions, but become polyelectrolyte-like upon the addition of 30 mM SDS, with about 6 SDS micelles bound to each PEO chain. Micelles associated with polymer are similar in structure and interactions to micelles that form in aqueous solutions in the absence of polymer. Addition of alcohol alters both the polymer and micelle structure and interactions, leads to detachment of micelles from the polymer, and the PEO chains regain their Gaussian conformation. 2-Propanol is more effective than ethanol in influencing the polymer conformation and the properties of SDS micelles in aqueous solutions, either in the presence or in the absence of PEO. This study contributes fundamental insights on polymer and surfactant organization in solution, as well as new, quantitative information on systems that are widely used in practice." @default.
• W2323255005 created "2016-06-24" @default.
• W2323255005 creator A5011259389 @default.
• W2323255005 creator A5040258798 @default.
• W2323255005 date "2014-09-02" @default.
• W2323255005 modified "2023-09-25" @default.
• W2323255005 title "Charging and Uncharging a Neutral Polymer in Solution: A Small-Angle Neutron Scattering Investigation" @default.
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• W2323255005 doi "https://doi.org/10.1021/jp5023168" @default.
• W2323255005 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25014246" @default.
• W2323255005 hasPublicationYear "2014" @default.
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