Question:medium

The Glass Transition Temperature (Tg) of a polymer is a critical parameter. Which of the following statements correctly describes the behaviour of a polymer below Tg?

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Think of polymers below $T_g$ as behaving like window glass (hard, rigid, brittle), and above $T_g$ as behaving like rubber or soft plastics.
The glass transition temperature is a second-order transition, meaning there is a change in heat capacity ($C_p$) but no latent heat.
Updated On: Jul 7, 2026
  • The polymer chains are in a liquid-like, flowable state
  • The polymer is in a "rubbery" state with high molecular mobility
  • The long-range segmental motion of polymer chains is "frozen," making the material brittle
  • The polymer undergoes a first-order phase transition from liquid to solid
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The Correct Option is C

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