Formative Practice 9.3 – Form 4 Science (KSSM) Chapter 9

Question 1:
Name two natural polymers and synthetic polymers and their monomers.


Question 2:
Compare the properties of natural rubber and vulcanised rubber.


Question 3:
Describe how vulcanised rubber is produced from natural rubber.

Heating natural rubber with sulphur
• Natural rubber is heated at a temperature between 100°C to 150°C at high pressure

• 3% to 5% sulphur is added to the heated rubber

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