The glass transition temperature (Tg) is a critical temperature at which an amorphous or semi-crystalline polymer or material undergoes a transition from a hard, brittle state to a more flexible or rubbery state. This transition is not a phase change like melting or freezing but involves a change in the material’s molecular mobility and structure.
At temperatures below the glass transition temperature, the polymer or material is typically rigid and exhibits a glassy, solid-like behavior. As the temperature increases beyond Tg, the material undergoes a transition to a more rubbery or viscous state, and its molecular chains become more mobile.
The glass transition temperature is crucial in various industries, particularly in the plastics and polymer industry, as it influences the mechanical, thermal, and processing properties of materials. It is an essential parameter for understanding the performance and stability of polymers in different applications.
