Rubber · Botany

What is vulcanization of rubber?

  1. Drying plant leaves slowly to extract natural chlorophyll pigment
  2. Heating rubber with sulfur to improve strength and elasticity
  3. Carefully separating cotton fibers from harvested seeds
  4. Fermenting tree bark slowly to obtain aromatic spices
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Correct answer: Heating rubber with sulfur to improve strength and elasticity

Vulcanization involves heating rubber with sulfur or sulfur compounds. This creates cross-links between polymer chains, making rubber stronger, more elastic, and more heat resistant.

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