ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMixed Micelles Formed by Cationic Surfactants and Anionic Hydrophobically Modified PolyelectrolytesBenoit Magny, Ilias Iliopoulos, Raoul Zana, Roland AudebertCite this: Langmuir 1994, 10, 9, 3180–3187Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Published inissue 1 September 1994https://pubs.acs.org/doi/10.1021/la00021a047https://doi.org/10.1021/la00021a047research-articleACS PublicationsRequest reuse...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTViscometric evidence of interactions between hydrophobically modified poly(sodium acrylate) and sodium dodecyl sulfateI. Iliopoulos, T. K. Wang, R. AudebertCite this: Langmuir 1991, 7, 4, 617–619Publication Date (Print):April 1, 1991Publication History Published online1 May 2002Published inissue 1 April 1991https://pubs.acs.org/doi/10.1021/la00052a003https://doi.org/10.1021/la00052a003research-articleACS PublicationsRequest reuse permissionsArticle...

Polystyrene (PS) end-capped polyelectrolytes were prepared by modification of polystyrene−poly(tert-butyl acrylate)−polystyrene triblock copolymers synthesized via anionic polymerization. These amphiphilic polymers are associated in dilute aqueous solutions forming loose multimicellar clusters. At higher polymer concentrations an extensive intermicellar bridging occurs, leading to the formation a transient network as revealed viscoelastic response system. The so-formed gel is characterized...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReversible Thermal Gelation in Polymer/Surfactant Systems. Control of the TemperatureK. Loyen, I. Iliopoulos, R. Audebert, and U. OlssonCite this: Langmuir 1995, 11, 4, 1053–1056Publication Date (Print):April 1, 1995Publication History Published online1 May 2002Published inissue 1 April 1995https://pubs.acs.org/doi/10.1021/la00004a002https://doi.org/10.1021/la00004a002research-articleACS PublicationsRequest reuse permissionsArticle...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAssociation and Thermal Gelation in Mixtures of Hydrophobically Modified Polyelectrolytes Nonionic SurfactantsAnne Sarrazin-Cartalas, Ilias Iliopoulos, Roland Audebert, Ulf OlssonCite this: Langmuir 1994, 10, 5, 1421–1426Publication Date (Print):May 1, 1994Publication History Published online1 May 2002Published inissue 1 1994https://pubs.acs.org/doi/10.1021/la00017a018https://doi.org/10.1021/la00017a018research-articleACS PublicationsRequest reuse...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplexation of acrylic acid copolymers with polybases: importance cooperative effectsI. Iliopoulos and R. AudebertCite this: Macromolecules 1991, 24, 9, 2566–2575Publication Date (Print):April 29, 1991Publication History Published online1 May 2002Published inissue 29 April 1991https://pubs.acs.org/doi/10.1021/ma00009a066https://doi.org/10.1021/ma00009a066research-articleACS PublicationsRequest reuse permissionsArticle...

The crosslinking of epoxidized natural rubber with dodecanedioic acid and the mechanism its acceleration by 1,2-dimethylimidazole (DMI) are investigated using nuclear magnetic resonance spectroscopy. Solid-state NMR experiments (1H, 1H → 13C cross-polarization direct polarization) used to analyse crosslinked samples, whereas solution provides information about liquid species. solid-state demonstrates ester nature crosslinks, confirms that DMI acts through formation imidazolium dicarboxylate...

Derivatives of poly(sodium acrylate) bearing a few mole percent perfluoroalkyl side chains were synthesized. Their solution properties investigated by rheology and compared to those their hydrogenated analogues. As the modified polymers, these new materials display an associating behavior. In semidilute polymer exhibits viscosities several orders magnitude higher than unmodified acrylate). However, this viscosifying effect is more pronounced for perfluorinated derivatives. By comparing...

The phase behavior and rheological properties of hydrophobically modified copolymers based on a thermosensitive N-isopropylacrylamide backbone are reported. These polymers bear rather high fraction (5−25 mol %) octyl, dodecyl, or octadecyl side groups, their solubility in water is ensured by positive charges, introduced to the same unit as alkyl group. Their governed competition between hydrophilic character charges hydrophobic groups. Thus, cloud point temperature, TCP, turbidity level...

The interactions between poly(N-isopropylacrylamide), PNIPAM, and poly(sodium acrylate) hydrophobically modified with octadecyl groups, HMPA, in aqueous solutions, were studied by using viscometry turbidimetry. viscosity of mixtures the two polymers, at 25 °C, may be several orders magnitude higher than corresponding PNIPAM unmodified precursor acrylate). modification degree greater enhancement. Furthermore, increasing molar mass leads to a more pronounced increase. elevation phase...

The association mechanism of several hydrophobically modified sodium polyacrylates (HMPA) in aqueous solutions has been investigated by fluorescence probing with pyrene as the fluorescent probe, electrical conductivity, and 13C NMR. HMPAs differed molecular weight poly(acrylic acid) precursor, degree hydrophobe substitution, carbon number (alkyl chain). results showed that is less cooperative than micellization conventional surfactants there a concentration below which no micelle-like...

We report on the viscoelastic response of a physical gel formed in aqueous solutions poly(sodium acrylate) end-capped with short polystyrene (PS) blocks. Above percolation threshold (cgel = 0.2 wt %) transient network is constituted PS hydrophobic domains (cross-links) interconnected via fully charged polyelctrolyte chains. Oscillatory shear and step-strain experiments were employed to study properties. The stretched conformation middle blocks (bridges) high hydrophobicity ends have...

Abstract The structure of polymer complexes stabilized through hydrogen bonds can be much influenced by the presence nonactive groups (structure defects) on chains. In this paper two very simple homopolymer/copolymer systems are studied: homopolymer is a polybase, polyoxyethylene (PEO) or polyvinylpyrrolidone (PVP), and copolymer partially neutralized poly(acrylic acid) (PAA). acrylate PAA chain behave as defects. Viscometry provides information about macroscopic complex in solution while...

We studied the effect of neutral polymer poly(vinyl alcohol) on rheological properties and microstructure highly charged mixed wormlike micelles anionic cationic surfactants, potassium oleate n-octyltrimethylammonium bromide, without adding salt. It was shown that induces a hundredfold increase viscosity longest relaxation time appearance well-defined plateau modulus, which assigned to interlacing micellar chains. When amount added exceeds 2 wt %, characteristics (the viscosity, time,...

Poly(ether ketone ketone) (PEKK) is a semicrystalline polymer investigated for highly demanding applications in aerospace, transportation, electronics, and oil & gas industries. The properties required these applications, such as thermomechanical chemical stability, are intimately linked to the crystalline state of material. PEKK exhibits polymorphism that depends, among other factors, on its thermal history. control quantification subject this study. Amorphous (T/I = 60/40, where T stands...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInterpolymer association between acrylic acid copolymers and polyethylene glycol: effects of the copolymer natureG. Bokias, G. Staikos, I. Iliopoulos, R. AudebertCite this: Macromolecules 1994, 27, 2, 427–431Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published inissue 1 January 1994https://pubs.acs.org/doi/10.1021/ma00080a016https://doi.org/10.1021/ma00080a016research-articleACS PublicationsRequest reuse...