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Displaying records 31 to 40 of 227 records.
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31. Critical Properties and Phase Separation in Lattice Boltzmann Fluid Mixtures
Published: 3/1/2001
Authors: Nicos Martys, Jack F Douglas
Abstract: Basic equilibrium properties of Lattice Boltzmann (LB) fluid mixtures (coexistence curve, surface tension, interfacial profile, correlation length) are calculated to characterize the critical phenomena occurring in these model liquids and to establis ...

32. Crystallization of Isotactic Polystyrene in Thin Films: A High Throughput Approach
Published: 1/1/2001
Authors: Kathryn L Beers, Jack F Douglas, Eric J. Amis, Alamgir Karim
Abstract: Very thin films of semi-crystalline polymers are increasingly being employed in coatings applications and there is a need to better understand how film thickness and crystallization conditions influence the crystalline morphology and resultingfilm pr ...

33. 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 ...

34. Crystallization of Polyethylene Oxide Patterend by Nanoimprint Lithography
Published: 3/28/2007
Authors: Brian C. Okerberg, Christopher L Soles, Jack F Douglas, Hyun Wook Ro, Alamgir Karim
Abstract: The crystallization behavior of poly(ethylene oxide) (PEO) films patterned by nanoimprint lithography is studied. The imprinted PEO film consists of parallel lines, approximately 240 nm wide and 320 nm tall, on a 400 nm pitch with a residual laye ...

35. Crystallization-Induced Fluid Flow in Polymer Melts Undergoing Solidification
Published: 2/19/2007
Authors: Donghua Xu, Z G Wang, Jack F Douglas
Abstract: The formation of semi-crystalline plastic polymer materials often occurs under confinement conditions where high pressure imprinting or casting in a mold are involved. To gain insight into this highly non-equilibrium process, we examine the nature ...

36. 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 ...

37. Determination of the Dielectric Constant of Nanoparticles. 1. Dielectric Measurements of Buckminsterfullerene Solutions
Published: 1/1/2000
Authors: Chad R Snyder, Jack F Douglas

38. Determination of the Dielectric Constant of Nanoparticles. I. Dielectric Measurements of Buckminsterfullerene Solutions
Published: 11/1/2000
Authors: Chad R Snyder, Jack F Douglas
Abstract: The static dielectric constant {epsilon} of buckminsterfullerene C^d60^ particles is determined in cis-decalin, toluene, and 1,2-dichlorobenzene using continuum models for spherical and sherical shell inclusions. The value for {epsilon} for isolated ...

39. Dielectric Spectroscopy Investigation of Relaxation in C60-Polyisoprene Nanocomposites
Published: 3/23/2009
Authors: Yifu Ding, Sebastian Pawlus, Alexei Sokolov, Jack F Douglas, Alamgir Karim, Christopher L Soles
Abstract: We investigate the influence of adding C60 nanoparticles on the dielectric relaxation spectra of both unentangled and entangled polyisoprene (PIP). Relaxation modes corresponding to both segmental and chain relaxation were analyzed over a broad tempe ...

40. Dielectric Study of the Anti-Plasticization of Trehalose by Glycerol
Published: 1/1/2006
Authors: A Anopchenko, Tatiana Psurek, David Lloyd VanderHart, Jack F Douglas, Jan Obrzut
Abstract: Recent measurements have suggested that the antiplasticizing effect of glycerol on trehalose can significantly increase the preservation times of proteins stored in this type of preservative formulation. In order to better understand the physical ori ...

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