Question:
Which of the following is a cross-linked, thermosetting polymer?
Which of the following is a cross-linked, thermosetting polymer?
Show Hint
Bakelite has a three-dimensional network from phenol-formaldehyde condensation.
Updated On: Oct 1, 2026
- Bakelite
- PVC
- Polystyrene
- PTFE (Teflon)
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Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept
A thermosetting polymer sets hard on heating and cannot be softened again. It has strong cross-links that join the chains in a three-dimensional network.
Step 2: Bakelite
Bakelite is formed by the condensation of phenol with formaldehyde. The product is heavily cross-linked, so it is thermosetting. It is used in electrical switches and handles.
Step 3: Others
PVC, polystyrene and PTFE are linear or slightly branched chains with no cross-links. They soften on heating and are thermoplastics.
Final Answer:
Bakelite is a cross-linked thermosetting polymer, option (A). \[ \boxed{\text{Bakelite}} \]
A thermosetting polymer sets hard on heating and cannot be softened again. It has strong cross-links that join the chains in a three-dimensional network.
Step 2: Bakelite
Bakelite is formed by the condensation of phenol with formaldehyde. The product is heavily cross-linked, so it is thermosetting. It is used in electrical switches and handles.
Step 3: Others
PVC, polystyrene and PTFE are linear or slightly branched chains with no cross-links. They soften on heating and are thermoplastics.
Final Answer:
Bakelite is a cross-linked thermosetting polymer, option (A). \[ \boxed{\text{Bakelite}} \]
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