Glass transition - Wikipedia
The glass–liquid transition, or glass transition, is the gradual and reversible transition in amorphous materials (or in amorphous regions within semicrystalline materials) from a hard and relatively brittle "glassy" state into a viscous or rubbery state as the temperature is increased. [2]
4.4: Glass Transition - Chemistry LibreTexts
2021年9月12日 · The glass transition is probably the most commonly-cited characteristic of a polymeric material. At the glass transition temperature, the physical nature of the material changes subtly. It goes from …
Polymer Chemistry: The Glass Transition - Engineering LibreTexts
When an amorphous polymer is heated, the temperature at which it changes from a glass to the rubbery form is called the glass transition temperature, Tg. A given polymer sample does not have a unique value of Tg because the glass phase is not at equilibrium.
Glass Transition - an overview | ScienceDirect Topics
The glass transition is a phenomenon in which a solid amorphous phase exhibits a more or less abrupt change in derivative thermodynamic properties (such as specific heat, thermal expansion coefficient, etc.) from “crystal-like” to “liquid-like” values with the change in temperature.
12.3: Glass Transition - Chemistry LibreTexts
The glass transition represents a phase change. As a polymeric material is cooled, it changes from a more flexible, rubbery state to a more rigid, glassy state. This transition occurs because of the change in volume with temperature.
Glass Transition - an overview | ScienceDirect Topics
The glass transition is the phenomenon in which a solid amorphous phase exhibits more or less abrupt changes in derivative thermodynamic properties such as heat capacity or thermal expansion: when an amorphous material changes from a solid state to a liquid state on heating or from a liquid to a solid-like state on cooling.
Glass transition - Simple English Wikipedia, the free encyclopedia
The glass transition is the transition of amorphous solids from a hard and brittle state into a molten or rubber-like state. An amorphous solid that goes through a glass transition is called a glass. Supercooling a viscous liquid into the glass state is called vitrification.
GLASS TRANSITION The glass transition occurs within amorphous materials or within the amorphous phase of semicrystalline material where the material molecules change from a rigid state to a rubbery mobile state through heating. The increased mobility results in several property changes, for example, the mechanical strength reduces and the
a theory of the glass transition focused on the question of how it might be possible for an ordinary material, obeying classical statistical mechanics, to move toward a frozen state,
Glass Transition and Related Phenomena - PMC - National …
2023年5月12日 · Despite recent advances in the study of complex systems, which were recognized by the Nobel Prize in Physics in 2021, glass transition and the physicochemical phenomena that occur in the supercooled liquid and glassy states have remained shrouded, at least partially, in mystery for various material groups.
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