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Showing 1 to 20 of 572 for “"glass transition"”.
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The Colloidal Glass Transition Under Confinement
Understanding the nature of the glass transition is one of the most challenging problems in condensed matter physics. Although ubiquitous and technically important, glasses still elude a universally accepted theoretical description. Here, we use colloidal particles as hard-sphere models and …
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The glass transition and reaction kinetics under nanoconfinement
The glass transition temperature (Tg) of the bulk state has been extensively studied, however there is no adequate theory of the glass transition. Furthermore, under nanoconfinement, Tg decreases, increases, or remains the same compared with that of the bulk, with results depending on starting …
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A Random First Order Theory of Liquid -Glass Transition
… is believed that all classical fluids could form glasses if cooled sufficiently fast so as to avoid crystallization. Various phenomena including violation of the usual Arrhenius law, stretched relaxations, deviations from the Stokes-Einstein relation in hydrodynamics, and aging have been observed …
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A Random first order theory of liquid-glass transition
… is believed that all classical fluids could form glasses if cooled sufficiently fast so as to avoid crystallization. Various phenomena including violation of the usual Arrhenius law, stretched relaxations, deviations from the Stokes-Einstein relation in hydrodynamics, and aging have been observed …
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The Role of the Glass Transition in Extruded Cereal Snack Character
It was proposed that the glass transition plays a role in the development of product structure as a result of its relationship to melt viscosity. It was proposed here that the location of Tg relative to the cereal melt temperatures (DeltaT) determines the viscosity of the melts (High DeltaT equates …
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Conformational relaxation in heme proteins: Ligand rebinding above the glass transition
Below the glass-transition temperature of the solvent, heme proteins are frozen into static conformations, and ligand rebinding is well described with a time- and temperature-independent distribution of enthalpic barriers, $g(H)$. This work addresses the relaxation of the enthalpic barriers that …
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Conformational relaxation in heme proteins : ligand rebinding above the glass transition
Below the glass-transition temperature of the solvent, heme proteins are frozen into static conformations, and ligand rebinding is well described with a time- and temperature-independent distribution of enthalpic barriers, g(H). This work addresses the relaxation of the enthalpic barriers that sets …
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Studies of kinetic glass transition in a triblock copolymer micellar system
… We define this structurally arrested matter a glass. Dynamically, a glass transition can be viewed as a transition from ergodic to nonergodic state of matters. In a hard-sphere system, mode coupling theory (MCT) predicts occurrence of a glass transition when the volume fraction exceeds a …
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Effect of structure and plasticizer on the glass transition of adsorbed polymer
… model, based on loosely-bound polymer (glass transition temperature, T<sub>g</sub>, similar to that of bulk) and tightly-bound polymer (T<sub>g</sub> higher than that of bulk) was used to interpret the thermograms. Similar amounts of tightly-bound polymer were found for 450 and 85 kDa …
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Dynamic Light Scattering in Alkali Borate Glass Melts Near the Glass Transition
The study of glass-forming liquids and their properties is of fundamental importance in materials science and engineering, as glasses have unique properties that make them useful for a wide range of applications. Among the different types of glasses, borate glasses are particularly interesting due …
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Slow dynamics in supercooled liquids : matrix formalism, mode coupling and glass transition
… as the order of the MC closure increases. New glass-transition phenomena are revealed by applying the standard MC closure to a two-Yukawa colloidal suspension.
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The Effects of Electron Radiation on the Glass Transition Temperature of a Polyetherimide
… investigated. In particular, the changes in the glass transition temperature (T<sub>g</sub>) with absorbed radiation dose were studied. The polymer was exposed to mono-energetic beams of 100-keV electrons and 1.0-MeV electrons for doses up to 100 megagray (MGy). Dosimetry for the exposures was …
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Thermal expansion, heat capacity and structural relaxation measurements in the glass transition region.
Massachusetts Institute of Technology. Dept. of Metallurgy. Thesis. 1966. Sc.D.
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Structure and Glass Transition Behavior of As-Rich As-Se Glasses: Modeling and Experiment
Chalcogenide glasses have been widely used in various technologies due to their wide IR transparency and good glass forming ability. Arsenic selenide glasses (AsxSe100-x), in particular, have been readily adopted for IR applications and widely studied to provide insights into fundamental …
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From the Boiling Point to the Glass Transition: Reorientational Dynamics as Revealed by Dynamic Light Scattering
Im Laufe dieser Arbeit wurde mit Hilfe der depolarisierten dynamischen Lichtstreuung (DLS) die Rotationsdynamik von molekularen und ionischen Flüssigkeiten im Temperaturintervall zwischen der Glasübergangstemperatur und dem Siedepunkt gemessen. Es werden depolarisierte Lichtstreuspektren von …
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Time Dependent Properties of Semicrystalline Poly(Arylene Ether Ether Ketone) (Peek) Above and Below the Glass Transition
… time annealing of semicrystalline PEEK above the glass transition results in the observation of several time dependent phenomena - "physical aging", "secondary crystallization", "multiple melting" of lamellae with different thermal stability etc. Their interrelation - common origin and kinetics of …
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Effect of heat treatment on dyeability, glass transition temperature, and tensile properties of polyacrylonitrile fibers (orlon 42)
… after they were boiled in water for 15 min. The glass transition temperatures (Tg) were obtained by differential scanning calorimetry. The ratio of the intensities of the CN/CH stretching bands were found by infrared spectroscopy, using the KBr method
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Laser surface thermal lensing (STL): An optical method for surface analysis of glass transition effects in transparent polymers
… sharply as the solid is heated through the glass transition temperature, changes in the STL signal can be used to detect Tg in spatially resolved surface regions as small as the focal point of the pump laser. This report will examine the relationship between the magnitude of the STL signal …
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The Effect of Starch Microstructure on Glass Transition, Gelatinization, and the Elevation of the Gelatinization Temperature by Saccharides
… and temperature of subsequent thermodynamic transitions.
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Roles of mesh size, segmental dynamic, glass transition temperature and molecular structure on penetrant diffusion in dense vitrimers
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01
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