Question:
Which is an example of thermosetting polymer?
Which is an example of thermosetting polymer?
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Thermosetting polymers have extensive cross-links, so they cannot be softened again by heat.
Updated On: Nov 12, 2026
- Bakelite
- Polystyrene
- Nylon 6,6
- Polyvinyl chloride
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept
Thermosetting polymers become permanently hard on heating because extensive cross-links form between the chains. They cannot be remelted or remoulded.
Step 2: Bakelite
Bakelite, the phenol-formaldehyde resin, is a three-dimensional cross-linked network, so it is thermosetting.
Step 3: Other options
Polystyrene and PVC are thermoplastics that soften on heating. Nylon-6,6 is a fibre.
Final Answer:
Bakelite is a thermosetting polymer. \[ \boxed{\text{(A) }\text{Bakelite}} \]
Thermosetting polymers become permanently hard on heating because extensive cross-links form between the chains. They cannot be remelted or remoulded.
Step 2: Bakelite
Bakelite, the phenol-formaldehyde resin, is a three-dimensional cross-linked network, so it is thermosetting.
Step 3: Other options
Polystyrene and PVC are thermoplastics that soften on heating. Nylon-6,6 is a fibre.
Final Answer:
Bakelite is a thermosetting polymer. \[ \boxed{\text{(A) }\text{Bakelite}} \]
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