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Author: jack douglas

Displaying records 211 to 220 of 221 records.
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211. Polycrystalline Growth: Dirt Versus Dynamical Heterogeneity
Published: Date unknown
Authors: L Granasy, T Pusztai, T Borzsonyi, James A Warren, Jack F Douglas
Abstract: Most research into microstructure formation during solidification has focused on single crystal growth forms, ranging from faceted crystals to dendritic growth patterns. However, these growth forms can be peturbed by heterogeneities yielding a rich ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853318

212. Polymer-Surface Interactions in Nanfilled Polymers
Published: Date unknown
Authors: Alamgir Karim, Jack F Douglas, A Nakatani, Eric J. Amis, D B Majumdar
Abstract: We review recent investigations of conventional and nanoparticle filled polymers using atomic force and optical microscopy, scattering (x-ray, neutron and visible light) to characterize the influence of filler particles on the phase separation morpho ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851599

213. Polymeric Liquids and Networks: Structure and Properties by William W. Graessley
Published: Date unknown
Author: Jack F Douglas
Abstract: Given the constantly evolving nature of polymer science, it is difficult to construct a unified description of its basics concepts and phenomenology. Graessley approaches this problem by addressing his book to a specific audience- the industrial engi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852478

214. Relationship Between Quantitative Dispersion and Physical Properties of PMMA/SWNT Nanocomposites
Published: Date unknown
Authors: Takashi Kashiwagi, Jeffrey A Fagan, Keith Yamamoto, A N Heckert, Stefan D Leigh, Jan Obrzut, F Du, Sheng Lin-Gibson, Minfang Mu, K Winey, R Haggenmueller, Jack F Douglas
Abstract: Six PMMA/SWNT(0.5 wt%) nanocomposite samples intended to have different dispersion levels were prepared by the coagulation method using six different concentrations of SWNTs in DMF from 0.05 mg/ml to 1.2 mg/ml. The morphology of the samples was deter ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861424

215. Spinodal Dewetting on Chemically Patterned Substrates
Published: Date unknown
Authors: A Sehgal, V Ferreiro, Jack F Douglas, Eric J. Amis, Alamgir Karim
Abstract: We utilize chemically patterned substrates with arrays of progressively narrower stripes (1-15 mm) to investigate the influence of pattern size on the morphology of dewetting polystyrene films. The early-stage dewetting patterns align with the substr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851885

216. Swelling of Grafted Polymer Brushes
Published: Date unknown
Authors: Jack F Douglas, M S Kent, Sushil K Satija, Alamgir Karim
Abstract: The end-grafting of polymer chains to surfaces provides a robust method for modifying surface properties. Such layers are increasingly being employed in applications-modifying the biocompatibility of implants, the wetting, adhesive and frictional pro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851771

217. Temperature Effects on Surface Pattern Formation in Thin Block Copolymer Films
Published: Date unknown
Authors: A P Smith, Jack F Douglas, Eric J. Amis, Alamgir Karim
Abstract: Hole formation on the surface of thin films of symmetric diblock copolymers is investigated as a function of time, t, temperature, T, and film thickness, h. The size of the holes approaches a steady state value at long times and their long-time size ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852214

218. The Influence of Polymer-Polymer and Polymer-Surface Interactions on the Formation and Swelling of End-Grafted Polymer Layers
Published: Date unknown
Author: Jack F Douglas
Abstract: Investigations at NIST on the influence of polymer-polymer excluded volume and polymer-surface interactions on the formation and swelling of end-grafted polymer layers are reviewed. Recent theoretical modeling of grafted layers having a low grafting ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851577

219. Thermal Degradation and Flammability Properties of Nanocomposites
Published: Date unknown
Authors: Takashi Kashiwagi, A B. Morgan, Joseph M Antonucci, Richard H. Harris Jr., E A Grulke, J NA Hilding, Jack F Douglas
Abstract: Thermal degradation and flammability properties of the two types of nanocomposites with nanosilica and carbon nanotubes were studied. PMMA, poly(metheyl methacrylate), nanocomposites were made by in situ radical polymerization of MMA, methylmethacryl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861189

220. Tuning the Fragility of Polymer Melts With Antiplasticizer Additives
Published: Date unknown
Authors: Robert A Riggleman, K Yoshimoto, Jack F Douglas, J J de Pablo
Abstract: Using molecular dynamics simulations, we have developed and analyzed a model that exhibits antiplasticization behavior by decreasing the glass transition temperature, increasing the density of the system below the glass transition temperature of the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852571



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