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• W2334681954 endingPage "3027" @default.
• W2334681954 startingPage "3019" @default.
• W2334681954 abstract "Polymer–surfactant complexes formed between charged copolymers and oppositely charged surfactants are analyzed as a function of the charge density in the macromolecule. Copolymers of ionizable diallyldimethylammonium chloride (DADMAC) and neutral acrylamide are obtained at different comonomer ratios. When mixed with the lamellar medium formed by the anionic surfactant 1,4-bis(2-ethylhexyl)sodium sulfosuccinate (AOT) in water, they give rise to highly condensed lamellar phases in equilibrium with another lyotropic phase. The structure of these phases is studied by SAXS and optical microscopy revealing the formation of copolymer–surfactant complexes which present a lamellar structure. The composition of the phases is inaccessible to direct determination, because they do not separate macroscopically (in most of the samples). Thus, the stoichiometry is determined using a model which considers the charge density of the copolymers. This model allows, from the experimental data provided by SAXS, to calculate the composition and volume ratio of the phases. The results indicate that these complexes are nonstoichiometric, containing a lesser amount of DADMAC than surfactant units. The neutral sequences of acrylamide can be considered as bridges along the water domains remaining anchored to the AOT bilayers by the cationic DADMAC units. When the charge density diminishes, the bridges become longer, rendering structures with higher water content." @default.
• W2334681954 created "2016-06-24" @default.
• W2334681954 creator A5013183907 @default.
• W2334681954 creator A5059865383 @default.
• W2334681954 creator A5060260009 @default.
• W2334681954 date "2013-02-27" @default.
• W2334681954 modified "2023-09-25" @default.
• W2334681954 title "Copolymer–Surfactant Complexes Obtained in a Lamellar Lyotropic Medium" @default.
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• W2334681954 doi "https://doi.org/10.1021/jp310238y" @default.
• W2334681954 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23387994" @default.
• W2334681954 hasPublicationYear "2013" @default.
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