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You searched on: Author: jack douglas

Displaying records 191 to 200 of 234 records.
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191. Preparation and Characterization of Polymer/Dendrimer Blends - Final Report, MAR, 2000
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6506
Published: 1/1/2000
Authors: Eric J. Amis, Barry J. Bauer, Alamgir Karim, Jack F Douglas, A Topp, F I Groehn, T J. Prosa, B D Viers, D W. Liu, K A Barnes, C L. Jackson, G Nisato

192. Suppression of Dewetting in Nanoparticle-Filled Polymer Films
Published: 1/1/2000
Authors: K A Barnes, Alamgir Karim, Jack F Douglas, A Nakatani, H Gruell, Eric J. Amis

193. Dynamic Entropy as a Measure of Caging and Persisent Particle Motion in Supercooled Liquids
Published: 11/1/1999
Authors: P Allegrini, Jack F Douglas, S C Glotzer
Abstract: The length-scale dependence of the dynamic entropy is studied in a molecular dynamics simulation of a binary Lennard-Jones liquid above the mode-coupling critical temperature T^dc^. A number of methods exist for estimating the entropy of dynamical s ...

194. Filler-Induced Composition Waves in Phase-Separating Polymer Blends
Published: 11/1/1999
Authors: B P Lee, Jack F Douglas, S C Glotzer
Abstract: The influence of a dilute concentration of filler particles on polymer blend phase separation is investigated computationally using a generalization of the Cahn-Hilliard-Cook (CHC) theory to include model filler particles (spheres, fibers, platelets) ...

195. Lattice Model of Living Polymerization I. Basic Thermodynamic Properties
Published: 10/1/1999
Authors: J Dudowicz, Karl Freed, Jack F Douglas
Abstract: A Flory-Huggins type model of living polymerization is formulated, incorporating chain stiffness, variable initiator concentration and polymer-polymer interactions. Basic equilibrium properties [average chain length L, average fraction of associated ...

196. Transient Target Patterns in Phase Separating Filled Polymer Blends
Published: 9/1/1999
Authors: Alamgir Karim, Jack F Douglas, G Nisato, D W. Liu, Eric J. Amis
Abstract: Recent simulations have indicated that the presence of filler particles in a phase separating blend can induce the development of composition waves having the symmetry of the filler particles. We investigate these predictions through atomic force mi ...

197. Thermal and Mass Diffusion in a Semidilute Good Solvent-Polymer Solution
Published: 8/1/1999
Authors: K J Zhang, M E Briggs, R W Gammon, J V Sengers, Jack F Douglas
Abstract: The Soret coefficient S^dT^ and collective (mass) diffusion coefficient D^dc^ of polystyrene dissolved in the good solvent toluene is measured over a range of concentrations and molecular weights using an optical beam deflection method. Our measurem ...

198. Mean-Field-Scaling in Lattice Boltzmann Fluid Mixtures
Published: 6/1/1999
Authors: Nicos Martys, Jack F Douglas
Abstract: Basic equilibrium properties of Lattice Boltzmann (LB) fluid mixtures (coexistence curve, surface tension, and interfacial profile) are calculated to characterize the critical phenomena occurring in these model liquids and to establish a reduced vari ...

199. Dynamic Entropy as a Measure of Caging and Persistent Particle Motion in Supercooled Liquids
Published: 1/1/1999
Authors: P Allegrini, Jack F Douglas, S C Glotzer

200. Excitation of Surface Deformation Modes of a Phase Separating Polymer Blend on a Patterned Substrate
Published: 1/1/1999
Authors: G Nisato, B D Ermi, Jack F Douglas, Alamgir Karim
Abstract: The phase separation kinetics of ultrathin deuterated poly(styrene)/poly(butadiene) polymer blend films spun cast onto striped self-assembled monolayer (SAM) substrates is studied by atomic force microscopy (AFM). Fourier transform analysis of the A ...

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