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Impact of an Irreversibly Adsorbed Layer on Local Viscosity of Nanoconfined Polymer Melts
(American Physical Society, 2011)
We report the origin of the effect of nanoscale confinement on the local viscosity of entangled polystyrene (PS) films at temperatures far above the glass transition temperature. By using marker x-ray photon correlation ...
Reduced Viscosity of the Free Surface in Entangled Polymer Melt Films
(American Physical Society, 2010)
By embedding ‘‘dilute’’ gold nanoparticles in single polystyrene thin films as ‘‘markers’’, we probe the local viscosity of the free surface at temperatures far above the glass transition temperature (Tg). The technique ...
Thickness Induced Structural Changes in Polystyrene Films
(American Physical Society, 2008)
Changes to the structure of polystyrene melt films as measured through the spectrum of density fluctuations have been observed as a function of film thickness down to the polymer radius of gyration (Rg). Films thicker ...