vitreous state
Quick Summary
The vitreous state refers to materials that are amorphous solids, meaning their atoms and molecules are not arranged in a regular lattice structure. These materials are often referred to as glasses. Unlike crystalline solids, which have long-range order, amorphous solids lack this repeating pattern. However, they do exhibit short-range order due to chemical bonding between atoms.123
Materials in the vitreous state, such as glass, plastic, and gel, retain their shape and resist shear stress, distinguishing them from liquids which flow and do not hold a definite shape. The transition to a solid, glassy state often occurs when a liquid is cooled rapidly, bypassing a distinct freezing point and solidifying at a glass transition temperature. This unique atomic arrangement gives vitreous materials properties like isotropicity, where characteristics such as tensile strength are uniform in all directions.124
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- chemistry of industrial polymersAmorphous and semicrystalline
…solid condition known as the glassy state. In the volume-temperature diagram shown in Figure 2, this state is represented by the points e (for amorphous polymers) and a (for semicrystalline polymers). As the polymer is heated, however, the molecules vibrate more energetically, until a transition occurs from the glassy state…
Read More…solid condition known as the glassy state. In the volume-temperature diagram shown in Figure 2, this state is represented by the points e (for amorphous polymers) and a (for semicrystalline polymers). As the polymer is heated, however, the molecules vibrate more energetically, until a transition occurs from the glassy state…
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plasticPhysical states and molecular morphologies…what is known as the glassy state; there is little or no movement of molecules past one another, and the material is stiff and even brittle. Above Tg the amorphous parts of the polymer enter the rubbery state, in which the molecules display increased mobility and the material becomes plastic…
Read More…what is known as the glassy state; there is little or no movement of molecules past one another, and the material is stiff and even brittle. Above Tg the amorphous parts of the polymer enter the rubbery state, in which the molecules display increased mobility and the material becomes plastic…
Read More