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Buna-S
Synthesis of Buna S
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).
In Buna-S, Bu stands for butadiene and, Na for sodium and S for styrene. It is vulcanized with sulphur. The rubber is slightly inferior to natural rubber in its physical properties.
Properties of Buna–S:
Uses of Buna–S:
Applications: