What is Glass transition?
The '''glass transition''' is the [[wikt:transition|transition]] of [[amorphous solid]]s from a hard and brittle [[Status|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]]. The '''glass transition temperature''' ''T''<sub>g</sub> is always lower than the [[melting point|melting temperature]], ''T''<sub>m</sub>, of the crystalline state of the material, if one exists. Above a glass transition temperature, a [[plastic]] is [[rubber]]y. Below the glass transition temperature, a plastic is [[solid]]. [[Thermoset]]s, or thermo-setting plastics, burn up before they reach their melt temperature, but most thermosets also undergo glass transition. == Other websites == {{commonscat-inline|Glass-liquid transitions}} {{physics-stub}} {{DEFAULTSORT:Glass Transition}} [[Category:Polymer chemistry]] [[Category:Thermodynamics]]