title: In situ X-ray polymerization: from swollen lamellae to polymer-surfactant complexes.
abstract: The influence of the monomer diallyldimethylammonium chloride (D) on the lamellar liquid crystal formed by the anionic surfactant aerosol OT (AOT) and water is investigated, determining the lamellar spacings by SAXS and the quadrupolar splittings by deuterium NMR, as a function of the D or AOT concentrations. The cationic monomer D induces a destabilization of the AOT lamellar structure such that, at a critical concentration higher than 5 wt %, macroscopic phase separation takes place. When the monomer, which is dissolved in the AOT lamellae, is polymerized in situ by X-ray initiation, a new collapsed lamellar phase appears, corresponding to the complexation of the surfactant with the resulting polymer. A theoretical model is employed to analyze the variation of the interactions between the AOT bilayers and the stability of the lamellar structure.
authors.affiliation: Dpt. CC y TT Fisicoquímicas, Facultad de Ciencias, UNED , P° Senda del Rey 9, 28040 Madrid, Spain.
authors.forename: Yahya
authors.initials: Y
authors.lastname: Agzenai
authors.forename: Björn
authors.initials: B
authors.lastname: Lindman
authors.forename: Viveka
authors.initials: V
authors.lastname: Alfredsson
authors.forename: Daniel
authors.initials: D
authors.lastname: Topgaard
authors.forename: Carmen S
authors.initials: CS
authors.lastname: Renamayor
authors.forename: Isabel E
authors.initials: IE
authors.lastname: Pacios
mesh_terms: D004143:Dioctyl Sulfosuccinic Acid / Q000737:chemistry*; D050866:Liquid Crystals / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*; D014965:X-Rays
chemical_list: D011108:Polymers; D013501:Surface-Active Agents; D004143:Dioctyl Sulfosuccinic Acid