Question:
Tg of a polymer can be determined by
Tg of a polymer can be determined by
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DSC is also used to study melting point and crystallization behavior of polymers.
Updated On: Feb 8, 2026
- NMR
- TEM
- DSC
- TGA
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The Correct Option is C
Solution and Explanation
Step 1: Understanding glass transition temperature (Tg).
The glass transition temperature is the temperature at which a polymer changes from a rigid, glassy state to a flexible, rubbery state. It is a thermal property related to molecular mobility.
Step 2: Technique used for Tg measurement.
Differential Scanning Calorimetry (DSC) measures changes in heat flow associated with thermal transitions in polymers, making it ideal for determining Tg.
Step 3: Analysis of options.
(A) NMR: Used for structural analysis, not thermal transitions.
(B) TEM: Used for morphological studies.
(C) DSC: Correct — Directly measures glass transition temperature.
(D) TGA: Measures weight loss, not Tg.
Step 4: Conclusion.
The glass transition temperature of a polymer is determined using DSC, hence option (C) is correct.
The glass transition temperature is the temperature at which a polymer changes from a rigid, glassy state to a flexible, rubbery state. It is a thermal property related to molecular mobility.
Step 2: Technique used for Tg measurement.
Differential Scanning Calorimetry (DSC) measures changes in heat flow associated with thermal transitions in polymers, making it ideal for determining Tg.
Step 3: Analysis of options.
(A) NMR: Used for structural analysis, not thermal transitions.
(B) TEM: Used for morphological studies.
(C) DSC: Correct — Directly measures glass transition temperature.
(D) TGA: Measures weight loss, not Tg.
Step 4: Conclusion.
The glass transition temperature of a polymer is determined using DSC, hence option (C) is correct.
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