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Title: Form fluctuations of polymer loaded spherical microemulsions studied by neutron scattering and dielectric spectroscopy

We investigate the structure and shell dynamics of the droplet phase in water/AOT/octane microemulsions with polyethyleneglycol (M{sub W} = 1500) molecules loaded in the droplets. Size and polydispersity of the droplets is determined with small angle X-ray scattering and small angle neutron scattering experiments. Shell fluctuations are measured with neutron spin echo spectroscopy and related to the dynamic percolation seen in dielectric spectroscopy. Shell fluctuations are found to be well described by the bending modulus of the shell and the viscosities inside and outside the droplets. Addition of the polymer decreases the modulus for small droplets. For large droplets the opposite is found as percolation temperature shifts to higher values.
Authors:
;  [1] ; ;  [2]
  1. Institute for Condensed Matter Physics, Technische Universität Darmstadt, Darmstadt (Germany)
  2. Institut Laue-Langevin, Grenoble (France)
Publication Date:
OSTI Identifier:
22419846
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 141; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DIELECTRIC MATERIALS; DROPLETS; FLUCTUATIONS; MICROEMULSIONS; MOLECULES; NEUTRON DIFFRACTION; NEUTRON SPECTROSCOPY; OCTANE; POLYMERS; SMALL ANGLE SCATTERING; SPHERICAL CONFIGURATION; X-RAY DIFFRACTION