Question:
Identify thermosetting polymer from following.
Identify thermosetting polymer from following.
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Urea-formaldehyde resin is cross-linked and sets permanently on heating.
Updated On: Oct 1, 2026
- Ureaformaldehyde resin
- Polystyrene
- Buna-S
- Terylene
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Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Thermosetting polymers are heavily cross-linked and become hard and infusible once heated and moulded. They cannot be remoulded.
Step 2: Check the Options:
Urea-formaldehyde resin: forms a cross-linked network, so it is thermosetting.
Polystyrene: linear chain, thermoplastic.
Buna-S: a synthetic rubber, an elastomer.
Terylene: a linear polyester, which is a fibre (thermoplastic).
Step 3: Conclusion:
Urea-formaldehyde resin is the thermosetting polymer.
Final Answer:
Urea-formaldehyde resin is thermosetting, option (A). \[ \boxed{\text{(A) Urea-formaldehyde resin}} \]
Thermosetting polymers are heavily cross-linked and become hard and infusible once heated and moulded. They cannot be remoulded.
Step 2: Check the Options:
Urea-formaldehyde resin: forms a cross-linked network, so it is thermosetting.
Polystyrene: linear chain, thermoplastic.
Buna-S: a synthetic rubber, an elastomer.
Terylene: a linear polyester, which is a fibre (thermoplastic).
Step 3: Conclusion:
Urea-formaldehyde resin is the thermosetting polymer.
Final Answer:
Urea-formaldehyde resin is thermosetting, option (A). \[ \boxed{\text{(A) Urea-formaldehyde resin}} \]
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