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Showing 1 to 20 of 330 for “"Glassy"”.
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Glassy models of protein folding
… properties. The model has unfolded, folded and glassy phases. In Chapter Three we investigate the dynamics of the model. The model has many metastable states and the distribution of the lifetimes of these states is log-normal at high temperatures and becomes much broader in the glassy phase. …
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Nanomechanics of Glassy Polymers Under Confinement
Many of today's nanotechnologies and processes rely on highly confined ($<30$ nm) polymer glasses and polymer nanocomposites. These materials have aided the development of smaller and faster computer chips, improved energy storage devices, protective coatings, and next generation materials with …
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Constitutive modeling of glassy memory polymers
… related for developing constitutive model for glassy shape memory polymers are addressed in detail. Shape memory polymers are novel material that can be easily formed into complex shapes, retaining memory of their original shape even after undergoing large deformations. The temporary shape is …
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Ultrasonic Welding of Glassy Thermoplastic Polymers
… to the formation of an ultrasonic weld in glassy thermoplastics are identified and used in the derivation of a classification for all welding techniques for these materials. Ultrasonic welds were studied using high speed photography, the measurement of polymer chain orientation and residual …
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Diffusion of diluents in glassy polymers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1994.
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Large inelastic deformation of glassy polymers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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Comparison of conventional and super-glassy polymers
In the field of gas separation, polymeric membranes are favorable materials. Polymers are inexpensive compared to ceramics and metals, offer a good processability, and possess the ability to operate at large scale. The most important fact about polymeric membranes is their good selectivity. …
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Crystallization of Lead Metaniobate From a Glassy Phase
Made available in DSpace on 2014-12-05T22:57:03Z (GMT). No. of bitstreams: 1 6100078.pdf: 4300490 bytes, checksum: 281800902b56d025fa60172a26636e2f (MD5) Previous issue date: 1960
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Crystalline and glassy states of ultracold atomic systems
"Spatially modulated ordered states, such as crystals, liquid crystals, and antiferromagnets, are ubiquitous in nature but relatively difficult to realize in ultracold atomic systems. In the present work, we present a scheme for generating controllable cavity-mediated interactions between atoms, …
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Finite strain elastic-plastic deformation of glassy polymers
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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Universal conductance fluctuations, glassy kinetics, and 1/f noise
The 1/f noise in strongly disordered metallic CCu and SiAu systems was studied in the temperature range 2-300 K. The temperature, frequency, and electric and magnetic field dependencies were found to be consistent with the predictions of the universal conductance fluctuation theory in the low …
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Universal conductance fluctuations, glassy kinetics, and 1/f noise
The 1/f noise in strongly disordered metallic CCu and SiAu systems was studied in the temperature range 2-300 K. The temperature, frequency, and electric and magnetic field dependencies were found to be consistent with the predictions of the universal conductance fluctuation theory in the low …
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Strain Localization in Tungsten Heavy Alloys and Glassy Polymers
… Similar phenomenon has been observed in glassy polymers deformed both at slow and high strain rates. Whereas strain localization is attributed to material softening due to thermal heating in metallic alloys, it is believed to be due to the reorganization of the molecular structure in …
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Aqueous reactivity of glassy industrial byproducts in alternative cementitious systems
… therefore necessary for GHG impact mitigation. Glassy silica-, alumina-, lime-, and/or alkali-rich industrial byproducts (IBs) exhibit the properties necessary to achieve emissions reductions while preserving final product attributes expected of cementitious binders. Research and industry have …
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Structure, Thermodynamics, Mechanical Properties and Glassy Dynamics in Anisotropic Polymeric Materials
A dynamical theory has been developed for the onset or crossover temperature (Tc) to highly non-Arrenhius activated relaxation regime in deeply supercooled polymer liquids. Alignment and/or deformation modify thermodynamic and structural properties thereby inducing anisotropic segmental dynamics. …
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Infrared Study of the Nonequilibrium Glassy State of Polymers (Frequency Shifts)
The nonequilibrium glassy state of polymers has been examined using Fourier-Transform Infrared (FTIR) spectroscopy. The nonequilibrium nature of polymer glasses induces a physical aging process which results in time dependent changes in physical, mechanical and thermodynamic properties. Valence …
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Theories of slow dynamics: from glassy colloidal suspensions to entangled macromolecular liquids
… by the intriguing slowing down of dynamics in glassy and polymeric fluids, microscopic theories for the dynamical behavior of these systems are explored. Of particular interest is the relative importance of equilibrium structure and topological constraints on system dynamics, and theories …
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An experimental and analytical investigation of the thermomechanical properties of Glassy polymers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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The effect of physical aging on the inelastic deformation of glassy polymers
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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