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Displaying records 211 to 220 of 227 records.
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211. Thermal and Flammability Properties of Polypropylene/Carbon Nanotube Nanocomposites
Published: 1/1/2004
Authors: Takashi Kashiwagi, E A Grulke, J Hilding, K Groth, R H Harris, K Butler, J R Shields, S B. Kharchenko, Jack F Douglas

212. Thermal and Flammability Properties of Polypropylene/Carbon Nanotube Nanocomposites
Published: 5/1/2004
Authors: Takashi Kashiwagi, E A Grulke, J NA Hilding, Richard H. Harris Jr., John R Shields, Kathryn M Butler, K M. Groth, S B. Kharchenko, Jack F Douglas
Abstract: The thermal and flammability properties of polypropylene/multi-walled carbon nanotube, (PP/MWNT) nanocomposites were measured with the MWNT content varied from 0.5 % to 4 % by mass. Dispersion of MWNTs in these nanocomposites was characterized by SEM ...

213. 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 ...

214. Thermally-Reversible Surface Morphology Transition Between Cylinders and Spheres in Thin Diblock Copolymer Films
Published: 7/28/2010
Authors: Xiaohua Zhang, Kevin G. Yager, Jack F Douglas
Abstract: Many phase transitions exhibit ordering transitions at the boundary of the material that are distinct from the interior where the intermolecular interactions can be significantly different. The present result considers the existence of a reversible s ...

215. Thermodynamic Regulation of Actin Polymerization
Published: 6/1/2001
Authors: P S Niranjan, J G Forbes, S C Greer, J Dudowicz, Karl Freed, Jack F Douglas
Abstract: A Flory-Huggins-type lattice model of actin polymerization under equilibrium conditions is employed to analyze new spectroscopic measurements for the extent of actin polymerization {diameter} as a function of temperature T, salt concentration [KC1], ...

216. Three Dimensional Cluster Distributions in Processed Multi-wall Carbon Nanotube Polymer Composites
Published: 6/25/2014
Authors: Doyoung Moon, Jan Obrzut, Jack F Douglas, Thomas F. Lam, Krzysztof Koziol, Kalman D Migler
Abstract: We determine the three-dimensional structure of melt-mixed carbon nanotube networks in an amorphous polymer via confocal microscopy and image analysis. We find that the CNTs networks consist of ramified clusters whose size distribution scales with cl ...

217. 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 ...

218. Tuning Polymer Melt Fragility With Antiplasticizer Additives
Published: 6/19/2007
Authors: Robert A Riggleman, Jack F Douglas, J J de Pablo
Abstract: A polymer-diluent model exhibiting antiplasticization has beendeveloped and characterized by molecular dynamics simulations. Antiplasticizer molecules are shown to decrease the glass transition temperature Tg, but to increase the elastic moduli o ...

219. 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 ...

220. Unusual Expansion and Contraction in Ultrathin Glassy Polycarbonate Films
Published: 4/1/2004
Authors: Christopher L Soles, Jack F Douglas, Ronald Leland Jones, Wen-Li Wu
Abstract: The thermal expansion behavior and glass transitions of poly(styrene) (PS) and poly(methyl methacrylate) (PMMA) are extensively studied in the thin film geometry. Both PS and PMMA are similar in that they possess very low entanglement densities. In ...

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