A microrheological study of physical gelation of hydrophobically modified associating polymers: Effects of temperature
| Autor: | Hasna Faten Mahjoub, Guylaine Ducouret, Tetsuharu Narita, Mohamed Hanafi, Tahar Othman, Marouen Zammali |
|---|---|
| Přispěvatelé: | Laboratoire de Physique de la Matiere Molle et de la Modélisation Electromagnétique [Tunis] (LP3ME), Faculté des Sciences Mathématiques, Physiques et Naturelles de Tunis (FST), Université de Tunis El Manar (UTM)-Université de Tunis El Manar (UTM), Institut National des Sciences Appliquées et de Technologie [Tunis] (INSAT), Sciences et Ingénierie de la Matière Molle (SIMM), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC), Hokkaido University [Sapporo, Japan], Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2017 |
| Předmět: |
Microrheology
Gel point Gelation ACID) Materials science Polymers and Plastics HYDROGELS Associating polymer Thermodynamics 02 engineering and technology RHEOLOGICAL PROPERTIES 010402 general chemistry 01 natural sciences Quantitative Biology::Cell Behavior Viscosity Rheology AQUEOUS-SOLUTIONS Polymer chemistry Materials Chemistry DRUG Complex fluid chemistry.chemical_classification VISCOELASTIC BEHAVIOR Aqueous solution Organic Chemistry COMPLEX FLUIDS Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences Condensed Matter::Soft Condensed Matter chemistry Self-healing hydrogels 0210 nano-technology [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft] |
| Zdroj: | Polymer Polymer, Elsevier, 2017, 121 (19), pp.204-210. ⟨10.1016/j.polymer.2017.06.022⟩ Polymer, 2017, 121 (19), pp.204-210. ⟨10.1016/j.polymer.2017.06.022⟩ |
| ISSN: | 0032-3861 |
| Popis: | International audience; The rheological properties of aqueous solutions of a hydrophobically modified poly(acrylic acid) were studied by diffusing-wave spectroscopy microrheology at various concentrations and temperatures and the formation of the transient network by hydrophobic association of the polymer chains was characterized. The Winter-Chambon power-law regime was found in a high frequency range accessible by microrheology, the physical gel point was successfully determined from the uniqueness of loss tangent, confirmed by the time-cure superposition of the mean-square displacement of the probe particles whose shift factors showed the critical power-law behaviors as a function of the relative distance from the gel point. The zero-shear viscosity as a function of the polymer concentration showed a plateau near the microrheologically determined gel point, indicating the presence of clusters which break before relaxing thus are rheologically undetectable. The largest relaxed cluster size was estimated to be 40 - 60 nm depending of the temperature. (C) 2017 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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