Analysis by the Two-Fluids Model of the Dynamical Behavior of a Viscoelastic Fluid Probed by Dynamic Light Scattering Auteur(s): Appell Jacqueline, Michel Eric, Porte Grégoire, Cipelletti L. (Article) Publié: Langmuir, vol. 20 p.984-990 (2004) Texte intégral en Openaccess : Ref HAL: hal-00002199_v1 PMID 15773134 Ref Arxiv: cond-mat/0407370 DOI: 10.1021/la035678h WoS: 000188660600066 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 19 Citations Résumé: The dynamic properties of a model transient network have been studied by dynamic light scattering. The network is formed by microemulsion droplets linked by telechelic polymers (modified hydrophilic polymers with two grafted hydrophobic stickers). We compare the properties of two networks that are similar but for the residence time of the hydrophobic stickers in the droplets. The results are interpreted according to the so-called two-fluids model, which was initially developed for semidilute polymer solutions and which we extend here to any Maxwellian viscoelastic medium characterized by its elastic modulus and terminal time as measured by rheology. This model is found to describe consistently and quantitatively the experimental observations. Commentaires: novembre 2003 |