What Is Tg Value

The glass transition temperature is the temperature range where the polymer substrate changes from a rigid glassy material to a soft (not melted) material, and is usually measured in terms of the stiffness, or modulus.

What is Tg measurement?

What is Tg, how is it measured? Glass Transition Temperature (Tg) is the point at which a material alters state – going from a glass-like rigid solid to a more flexible, rubbery compound. Tg is normally measured on a Differential Scanning Calorimeter (DSC) piece of whizzy equipment.

What is Tg in polymer chemistry?

When an amorphous polymer is heated, the temperature at which the polymer structure turns “viscous liquid or rubbery” is called the Glass Transition Temperature, Tg. … This temperature (measured in °C or °F) depends on the chemical structure of the polymer and can therefore be used to identify polymers.