Engineering
Chemistry
Polymers
Question
What are the differences between Buna – N and Buna – S ?
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Solution
| BUNA-N | BUNA-S |
| (1) Monomers 1,3 - butadiene and acrylonitrile. | (1) Monomers:1,3 - butadiene and styrene. |
| (2) Also called as Nitrile-Butadiene-Rubber (NRB). | (2) Also called as Styrene-Butadiene-Rubber (SBR). |
| (3) It is formed by polymerization of 1,3-butadiene and acrylonitrile in the presence of sodium. | (3) It is formed by the polymerization of 1,3 - butadiene and styrene in the ratio 3:1 in the presence of sodium. |
| (4) Used in making oil seals, manufacturing of tanks,etc. | (4) Used for making automobile tyres , etc. |
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