Vulcanized rubber is an example of ______________?
Correct answer: B. semisynthetic polymers
- A. Natural polymers
- B. semisynthetic polymers
- C. Synthetic polymers
- D. None of These
Explanation
Vulcanized rubber is natural rubber chemically modified by heating it with sulphur, which creates cross-links between polyisoprene chains. Because it is derived from a natural polymer but chemically processed, it is classified as semisynthetic. The likely wrong choice is natural polymer because the starting material is natural rubber, but vulcanisation changes its classification to semisynthetic.
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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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