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dynamical heterogeneity
Dynamical heterogeneity is a term used to describe the anomalous behaviour of glass forming materials undergoing phase transitions from liquid state to the glassy state upon cooling at varying rates.
==Polymers==
Polymer properties include viscoelasticity and may be synthetic or natural. When a polymeric liquid is cooled below its freezing temperature without crystallizing, it becomes a supercooled liquid preferably. When the supercooled liquid is further cooled, it becomes a glass.〔
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The temperature at which a polymer becomes a glass by fast cooling is called the glass transition temperature Tg. At this temperature, viscosity reaches up to 1013 poise depending upon cooling-rate.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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