lasisiirtymälämpötilan
Lasisiirtymälämpötila, often abbreviated as Tg, refers to the temperature at which an amorphous solid, such as glass or certain polymers, transitions from a rigid, glassy state to a more flexible, rubbery state. This transition is not a sharp melting point but rather a gradual change in the material's properties over a temperature range. Below the glass transition temperature, the material is hard and brittle, with limited molecular mobility. Above Tg, the polymer chains gain enough kinetic energy to move and slide past each other, leading to increased flexibility and ductility.
The glass transition temperature is a crucial property in material science and engineering, as it dictates