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Author: jack douglas

Displaying records 191 to 200 of 221 records.
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191. Preparation and Characterization of Polymer/Dendrimer Blends Progress Report 2/24/97
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6183
Published: 6/1/1998
Authors: Eric J. Amis, Barry J. Bauer, F I Groehn, T J. Prosa, Da-Wei Liu, K A Barnes, C L. Jackson, B D Viers, Alamgir Karim, Jack F Douglas
Abstract: Dendrimer, dendrigraft, and hyperbranched solutions, blends, and interpenetrating polymer networks are characterized by small neutron and x-ray scattering, reflectivity, atomic force microscopy, and transmission electron microscopy.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851476

192. NIST Meeting on Multicomponent Polymers and Polyelectrolytes
Series: Journal of Research (NIST JRES)
Published: 3/1/1998
Author: Jack F Douglas
Abstract: A joint meeting was held between the NIST Polymer Blends and Processing Group and ERATO. The purpose of the conference was to review progress made by the NIST and ERATO groups in experimental and theoretical aspects of phase separation in polymer bl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851431

193. Colliding Self-Assembly Waves in Organosilane Monolayers
Published: Date unknown
Authors: K Efimenko, Ali Ozcam, Jan Genzer, Daniel A Fischer, Frederick R Phelan Jr, Jack F Douglas
Abstract: Colliding autocatalytic wave-fronts of organosilane (OS) layer self-assembly are generated through the controlled positioning of sources of the volatile OS material at the edges of a silica wafer and through adjustment of the container dimensions in ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903663

194. Comparison of Methods for Calculating the Friction Coefficient and Intrinsic Viscosity of Nanoparticles and Macromolecules
Published: Date unknown
Authors: M Mansfield, Jack F Douglas, Saba Irfan, E Kang
Abstract: Various methods have been proposed to estimate the translational friction coefficient f and the intrinsic viscosity [?] of polymers and other particles of complex shape. These methods range from first-principles calculations based on a precise desc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852612

195. Coping With Complex Surfaces: An Interface Between Mathematics and Condensed Matter Physics
Published: Date unknown
Author: Jack F Douglas
Abstract: A transcript of a talk on the application of mathematics to materials science is presented. The talk considers the application of random walk methods to solving boundary value problems with complex boundaries, as found in applications to polymer and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851513

196. Coupling Between Phase Separation and Surface Deformation Modes in Self-Organizing Polymer Blend Films
Published: Date unknown
Authors: B D Ermi, G Nisato, Jack F Douglas, J Rogers, Alamgir Karim
Abstract: Phase separation of ultrathin polymer blend films spun cast onto patterned self-assembled monolayers is examined by atomic force microscopy. Fourier transform analysis of the time evolution of the film topography reveals a coupling between the phase ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851478

197. Crystallization of Poly(ethylene oxide) on Topographically Patterned Substrates
Published: Date unknown
Authors: Brian C. Okerberg, Christopher L Soles, Jack F Douglas, Alamgir Karim
Abstract: Crystallization of poly(ethylene oxide) (PEO) on topographically patterned substrates is investigated. Primary nucleation was dramatically enhanced during solvent drying on patterned substrates compared to flat films. The nucleation density also in ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852757

198. Dendritic Crystallization in Thin Films of PEO/PMMA Blends: A Comparison to Crystallization of Small Molecule Liquids
Published: Date unknown
Authors: Brian C. Okerberg, H Marand, Jack F Douglas
Abstract: Dendritic crystallization of PEO/PMMA thin films is reported. The film thickness is kept constant while the PMMA molar mass and blend composition are varied. Some basic features of dendritic growth, such as the diffusion length and tip curvature ar ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852771

199. Dispersion and Shear Viscosity of a Simulated Polymer Nanocomposite
Published: Date unknown
Authors: Francis W. ~undefined~undefined~undefined~undefined~undefined Starr, Jack F Douglas, S C Glotzer
Abstract: Using molecular dynamics simulations, we explore properties affecting nano-filler dispersion in a dense bead-spring polymer melt, and how the state of dispersion alters the response of the system to shear. We determine a simple metric to determine t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852087

200. Effects of Aspect Ratio of Multi-Walled Carbon Nanotube on Flammability Properties of Polymer Nanocomposites
Published: Date unknown
Authors: Bani Cipiriano, Takashi Kashiwagi, Srinivasa R. Raghavan, Ying Yang, E A Grulke, Kazuya Yamammoto, John R Shields, Jack F Douglas
Abstract: The effects of the aspect ratio of multi-walled carbon nanotube (MWNT) on viscoelastic properties and flammability properties of PS/MWNT nanocomposites are studied with two different MWNTs having average aspect ratios of 49 and 150. While no signifi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861452



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