Question

What is Buna – S? How is it synthesized?

Answer 1

Answer:

Buna-S rubber is one of the commonly used synthetic rubber. Buna-S Rubber: It is a random co-polymer formed by the emulsion polymerisation 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.

Answer 2

Answer:

Buna-S is a copolymer of butadiene and styrene. It is prepared by copolymerization of 1,3 butadiene and styrene along with sodium.

Explanation:

• Buna-S is a butadiene/styrene copolymer.
• It is prepared by copolymerization of 1,3 butadiene and styrene along with sodium.
• It is produced by combining two monomers, styrene, and butadiene.
• These two monomers are polymerized in two ways: as a solution (S-SBR) or as an emulsion (E-SBR).
• Bu is for butadiene, Na is for sodium, and S is for styrene in Buna-S.
• It is vulcanized with sulphur.
• The physical qualities of the rubber are slightly inferior to those of natural rubber.
• The styrene/butadiene ratio affects the polymer's properties: rubbers with a high styrene concentration are harder and less bouncy.
• It is a replacement for natural rubber.
• When treated with additives, it offers high abrasion resistance and aging stability.

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