title: Structural, Viscoelastic, and Electrochemical Characteristics of Self-Assembled Amphiphilic Comblike Copolymers in Aqueous Solutions.
abstract: Self-assembly in aqueous solutions of an amphiphilic comblike polyelectrolyte (80C12) that consists of a polystyrene (PS) backbone onto which quaternary ammonium pendant moieties have been grafted has been investigated by light scattering and cryo-transmission electron microscopy measurements in the presence of KCl and methylviologen dication (MV2+) under conditions mimicking those for electrochemical measurements. Polymer chains self-assemble within branched cylindrical micelles that display viscoelastic properties, characterized by a relaxation time of 4 s. To tune this time, 80C12 was mixed with a polyoxyethylene nonionic surfactant (Brij C12E10). Relatively increasing the amount of the latter leads to a decrease in the relaxation time of the 80C12 solution. Correlatively, electrochemical experiments with a rotating disk electrode show a transition of the mass transport rate, which deviates from the classical Newtonian behavior in the same velocity domain. This result generalizes what has been already observed with solutions of linear polymers of high molecular weight and wormlike micelles based on surfactants subjected to elongational deformations. Moreover, the critical times derived from rheological and electrochemical experiments display the same trend.
authors.affiliation: Laboratoire d'Electrochimie, Corrosion et de Valorisation Energétique (LECVE), Faculté de Technologie, Université A. MIRA , Bejaia 06000, Algérie.|Université du Maine, IMMM UMR CNRS 6283 , Avenue Olivier Messiaen, 72085 Le Mans, Cedex 5, France.
authors.forename: Malika
authors.initials: M
authors.lastname: Talantikite
authors.affiliation: Laboratoire d'Electrochimie, Corrosion et de Valorisation Energétique (LECVE), Faculté de Technologie, Université A. MIRA , Bejaia 06000, Algérie.
authors.forename: Kahina
authors.initials: K
authors.lastname: Aoudia
authors.affiliation: Université du Maine, IMMM UMR CNRS 6283 , Avenue Olivier Messiaen, 72085 Le Mans, Cedex 5, France.
authors.forename: Lazhar
authors.initials: L
authors.lastname: Benyahia
authors.affiliation: Laboratoire d'Electrochimie, Corrosion et de Valorisation Energétique (LECVE), Faculté de Technologie, Université A. MIRA , Bejaia 06000, Algérie.
authors.forename: Lila
authors.initials: L
authors.lastname: Chaal
authors.affiliation: Université du Maine, IMMM UMR CNRS 6283 , Avenue Olivier Messiaen, 72085 Le Mans, Cedex 5, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Chassenieux
authors.affiliation: Laboratoire Interfaces et Systèmes Electrochimiques, Sorbonne Universités, UPMC Univ Paris 06, CNRS , 4 place Jussieu, F-7500 Paris, France.
authors.forename: Claude
authors.identifier: 0000-0002-4174-6146
authors.initials: C
authors.lastname: Deslouis
authors.affiliation: U.R. 1268 Biopolymères Interactions Assemblages (BIA), INRA , Rue de la Géraudière, BP71627, 44316 Nantes, Cedex 3, France.
authors.forename: Cédric
authors.initials: C
authors.lastname: Gaillard
authors.affiliation: Laboratoire d'Electrochimie, Corrosion et de Valorisation Energétique (LECVE), Faculté de Technologie, Université A. MIRA , Bejaia 06000, Algérie.
authors.forename: Boualem
authors.initials: B
authors.lastname: Saidani