What Is Glass Transition?

Glass transition refers to the transition of an amorphous substance between a glassy state and a liquid state. For polymers, glass transition is the transition between the glassy and highly elastic state of an amorphous polymer. Glass transitions also occur in the amorphous regions of crystalline polymers. Glass transition has a great influence on polymer properties, especially mechanical properties. The temperature at which the glass transition occurs is called the glass transition temperature and is the characteristic temperature of the polymer. It has a great relationship with the flexibility of polymer segments. Generally, the softer the segment, the lower the glass transition temperature, the greater the rigidity of the segment, and the higher the glass transition temperature.