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glass transition
This term is a specialized technical expression used primarily in polymer science, materials engineering, and chemistry. It describes a physical phenomenon rather than a chemical reaction, marking the shift in molecular mobility within an amorphous solid. In a professional or academic context, it is often abbreviated as Tg.
Because it refers to a specific thermodynamic property or a phase-like transition, the term is treated as an uncountable concept. It is typically used in the singular to describe the general phenomenon or as a modifier for "temperature" to specify the exact point of transition.
Meanings
The temperature range or specific point at which an amorphous material, such as a polymer or glass, transitions from a hard, brittle, glassy state to a more flexible, rubbery state upon heating.
The polymer's glass transition temperature determines its suitability for high-temperature applications.
Examples
The polymer undergoes a glass transition as the temperature rises.
The polymer undergoes a glass transition as the temperature rises.
We need to determine the exact point of glass transition for this resin.
Wait, did the sample reach its glass transition yet?
The material becomes rubbery after the glass transition occurs.
I wonder if the cooling rate affects the glass transition temperature.
I wonder if the cooling rate affects the glass transition temperature.
The professor explained how glass transition differs from melting.
A sharp change in heat capacity marks the glass transition.
This plastic is brittle because it is below its glass transition.