Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2004-07-14
Langmuir 20 (2004) 984-990
Physics
Condensed Matter
Soft Condensed Matter
novembre 2003
Scientific paper
10.1021/la035678h
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.
Appell Jacqueline
Cipelletti Luca
Michel Eric
Porte Gregoire
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