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Search Publications by: Wen-Li Wu (Assoc)

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Displaying 176 - 193 of 193

Shear Induced Polymer Melt Desorption From an Attractive Substrate

June 24, 1999
Author(s)
Eric K. Lin, R Kolb, Wen-Li Wu, Sushil K. Satija
Shear induced adsorption/desorption of a highly entangled polymer melt from an attractive interface was directly observed using neutron reflectometry. The concentration of poly(methyl methacrylate) (d-PMMA) in a hydrogenated PMMA matrix was measured within

Polymer Mobility Near the Polymer/Solid Interface

May 6, 1999
Author(s)
Eric K. Lin, Wen-Li Wu, Sushil K. Satija, R Kolb
Neutron reflectometry is used to measure polymer mobility near an attractive solid surface over distances less than the bulk polymer radius of gyration, R g. Effective diffusion coefficients, D eff, are determined from the rates of interdiffusion between

Characterization of Planarity of Polymer Thin Films on Rough Surfaces

July 1, 1998
Author(s)
Wen-Li Wu, William E. Wallace
Angle-dependent total reflection x-ray fluorescence (TRXF) is used to characterize the surface roughness or the extent of planarization of a thin polymer coating on a stainless steel surface with significant roughness. The objective of this work is to

A Novel Method to Determine the Mechanical Properties of Ultra-Thin Films

April 1, 1998
Author(s)
Christopher C. White, Wen-Li Wu
Recent experimental results based on x-ray reflectivity, ellipsometry and positron annihilation spectroscopy, etc. have demonstrated that physical properties of polymer films thinner than one micron may deviate significantly from the expected bulk values
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