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Which of the following is an example of thermosetting plastic?
- a)Bakelite
- b)PVC
- c)Polyethylene
- d)No option is correct.
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which of the following is an example of thermosetting plastic?a)Bakeli...
- Thermosetting plastic is a type of plastic which once heated gets solidified and cannot be remoulded or melted on subsequent applications of heat.
- This occurs due to the formation of cross links in the polymer which prevent it from being remoulded.
- Bakelite is an example of thermosetting plastics.
- PVC and polyethylene are examples of thermoplastics. These are the types of polymers that melt on heating and solidify on cooling.
Most Upvoted Answer
Which of the following is an example of thermosetting plastic?a)Bakeli...
Thermosetting Plastic: Bakelite
Thermosetting plastics are a type of polymer that, once cured, cannot be melted or reshaped. Bakelite is a prime example of a thermosetting plastic.
Characteristics of Bakelite:
- Bakelite is a synthetic plastic material that was one of the first plastics made from synthetic components.
- It is a thermosetting phenol formaldehyde resin, meaning it undergoes a chemical reaction during curing which forms irreversible cross-links between polymer chains.
- Once cured, Bakelite becomes rigid and retains its shape even at high temperatures, making it suitable for use in heat-resistant applications.
- It has good electrical insulating properties, high mechanical strength, and excellent resistance to chemicals.
- Bakelite is commonly used in electrical insulators, automotive components, and kitchenware.
Comparison with Thermoplastic:
- Unlike thermoplastics such as PVC and polyethylene which can be melted and reshaped multiple times, Bakelite cannot be softened once it has been cured.
- This property makes thermosetting plastics like Bakelite ideal for applications where heat resistance and dimensional stability are critical.
In conclusion, Bakelite is a classic example of a thermosetting plastic due to its unique properties and irreversible curing process.
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Which of the following is an example of thermosetting plastic?a)Bakeliteb)PVCc)Polyethylened)No option is correct.Correct answer is option 'A'. Can you explain this answer?
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