Natural Rubber (2)

Elasticity of unvulcanised rubber

a

Elasticity of vulcanised rubber

b

Scientific name of rubber trees

The scientific name Hevea brasiliensis

The history of rubber trees brought to Malaysia

Rubber trees were brought to Malaysia in 1877

Among Malaysia’s major exports

Are rubber gloves, condoms and catheters

Latex (1)

Is a colloid and not a solution

Latex (2)

Latex is a white fluid obtained from rubber trees when the tree bark is tapped

Monomer for polyisoprene

Is isoprene or with the IUPAC name 2-methylbut-1,3-diene

Effect of the protein membrane of rubber particles is negatively charged on the outer surface

This causes rubber particles to repel each other, preventing coagulation

Factors that affect the characteristics of natural rubber (1)

Depend on rubber polymers that are natural elastomeric polymers