Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"relaxation time distribution"”.
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An inverse problem framework for reconstruction of phonon properties using solutions of the Boltzmann transport equation
… solid material, such as the frequency-dependent relaxation time distribution, from thermal spectroscopy experimental results is proposed and extensively validated. The reconstruction is formulated as a non-convex optimization problem whose goal is to minimize the difference between the …
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Physical Aging and Characterization of Engineering Thermoplastics and Thermoplastic Modified Epoxies
… physical properties, such as physical aging and relaxation time distributions, and chemical structure for a variety of polymeric systems were investigated. Although there is a vast amount of physical aging data for polymers, most of these studies do not attempt to correlate structure with …
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Pore size distribution and methane equilibrium conditions at Walker Ridge Block 313, northern Gulf of Mexico
… in the northern Gulf of Mexico. The pore size distributions were determined by constructing a synthetic nuclear magnetic resonance (NMR) relaxation time distribution. Correlations were obtained by non-linear regression on NMR, gamma ray, and bulk density logs from well KC-151 at Keathley …
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Use of Rheology to Assess Structures in Polymer Nanocomposites
… imparts solid-like behavior to the long-time response of a wide variety of complex fluids. The main focus of this PhD dissertation is distinguishing the main parameters affecting particle-particle and polymer-particle interactions and using this knowledge to develop nanocomposites with …
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Structural Investigations of Highly Strictive Materials
… sensitivity to electric field and a broadened relaxation time distribution. In KNN textured ceramics, an aging effect was found to exist in the orthorhombic single phase field, not only in the orthorhombic and tetragonal two-phase field as previously reported. No variation of phase structure …
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The Role of Penetrant Structure on the Transport and Mechanical Properties of a Thermoset Adhesive
… of reduced variables. The concept of a diffusion-time shift factor (log aDt) has been introduced to create doubly-reduced master curves, taking into account the effects of temperature and the variations in the polymer mechanical response due to the existence of a low molecular weight penetrant.