Question

How is BUNA – S prepared? Write any 2 uses and properties of it.

Answer 1

Preparation:

-It is a random co-polymer formed by the emulsion polymerization of a mixture of 1:3 butadiene and styrene in the presence of peroxide catalyst at 5 degree Celsius and therefore the product is called as cold rubber.  The rubber obtained is also called Styrene butadiene rubber (SBR).

-It is vulcanized with sulfur. The rubber is slightly inferior to natural rubber in its physical properties.

Uses:

1)  It is used for the manufacture of passenger car tyres and treads, motor cycle and scooter tyres, cycle tyres and tubes.

2) They are also used for the manufacture of conveyor belts, foot-wares, shoe soles, hoses and electrical insulation

Answer 2

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The rubber obtained is also called Styrene butadiene rubber (SBR). ... The rubber is slightly inferior to natural rubber in its physical properties. Uses: 1) It is used for the manufacture of passenger car tyres and treads, motor cycle and scooter tyres, cycle tyres and tubes.