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Author: jack douglas

Displaying records 61 to 70 of 224 records.
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61. Entropy Theory of Polymer Glass-Formation Revisited. II. Influence of Mass, Pressure, and Size of Side Groups and Similarities to Equilibrium Polymerization
Published: 2/8/2006
Authors: J Dudowicz, Karl Freed, Jack F Douglas
Abstract: Recent measurements reveal striking trends in the variation of fragility (the strength of the temperature dependence of the fluid viscosity) of glass-forming polymer liquids with monomer structure and pressure. The elucidation of the physical origin ...

62. 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 ...

63. Lessons From Simulation Regarding the Control of Synthetic Self-Assembly
Published: 1/1/2006
Authors: Jack F Douglas, K VanWorkum
Abstract: We investigate the role of the particle potential symmetry on the form of self-assembly by Monte Carlo simulation with the particular view towards synthetically creating structures of prescribed form and function. We establish a general tendency for ...

64. Phase Field Theory Of Crystal Nucleation And Polycrystalline Growth: A Review
Published: 1/1/2006
Authors: L Granasy, P Pusztai, T Borzsonyi, G Toth, G - Tegze, James A Warren, Jack F Douglas

65. Symmetry, Equivalence and Molecular Self-Assembly
Published: 1/1/2006
Authors: K VanWorkum, Jack F Douglas

66. Nanoparticle Networks Reduces Flammability of Polymer Nanocomposites
Published: 12/1/2005
Authors: Takashi Kashiwagi, F Du, K Winey, Jack F Douglas, Richard H. Harris Jr., John R Shields
Abstract: Synthetic polymer materials are rapidly replacing more traditional materials such as steel, nonferrous metals and natural polymeric materials. Because these novel materials are combustible under certain conditions, their utilization often requires re ...

67. Fragility of Glass-Forming Polymer Liquids
Published: 10/4/2005
Authors: J Dudowicz, Karl Freed, Jack F Douglas
Abstract: Many fluids exhibiting complex molecular structure or interactions solidify by glass-formation rather than crystallization. This tendency is especially prevalent in polymeric and biological systems where glass-formation is normal rather than exceptio ...

68. Entropy Theory of Polymer Glass-Formation Revisited. I. Characteristic Temperatures, Fragility, and Relaxation Times
Published: 9/20/2005
Authors: J Dudowicz, Karl Freed, Jack F Douglas
Abstract: Considerable physical evidence supports the idea of Gibbs and DiMarzio (GD) that glass-formation arises when the configurational entropy of a liquid becomes critically small and the subsequent arguments by Adam and Gibbs (AG) that quantitatively rela ...

69. Wetting-Dewetting Transition Line in Thin Polystyrene Films
Published: 9/9/2005
Authors: H Raghavan, K M. Ashley, A Seghal, Jack F Douglas, Alamgir Karim
Abstract: We review recent advances in the application of combinatorial methods to polymer thin film characterization. Combinatorial methods allow the rapid exploration of multidimensional parameter spaces that naturally arise in the description of polymer f ...

70. Direct Computation of Characteristic Temperatures and Relaxation Times for Glass-Forming Polymer Liquids
Published: 9/1/2005
Authors: J Dudowicz, Karl Freed, Jack F Douglas
Abstract: Characteristic temperatures and structural relaxation times for different classes of glass-forming liquids have been computed using a revised entropy theory of glass-formation that permits the chain backbone and side-groups to have different rigiditi ...

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