Example of cross linked polymer is ____________?
Correct answer: C. bakelite
- A. Nylon
- B. Polyester
- C. bakelite
- D. PVC
Explanation
Bakelite is a thermosetting phenol-formaldehyde polymer with extensive cross-links between its chains. This three-dimensional network makes it hard and unable to soften repeatedly on heating. The likely wrong choice is nylon because it is a condensation polymer, but ordinary nylon is mainly linear rather than cross-linked.
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About Polymers
Polymers are large molecules made from repeating monomer units joined by covalent bonds. The topic distinguishes addition polymers such as polyethylene, PVC and polystyrene from condensation polymers such as nylon and polyester, and relates chain structure to thermoplastics, thermosetting polymers, elastomers, properties, uses and environmental concerns.
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