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Whatare elastomers ? Writethe chemical equation to representthe preparation of Buna - S. |
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Answer» SOLUTION :Elastomers : Polymers in whichpolymericchainsare heldtogether by theweakestintermoleuclarforces. They can be stretched DUETO weak forces of attraction . On releasingthe forces, they attain the originalposition . Buna - S can be prepared by reactionof 1,3-butadiene andstyreneinpresenceof sodium as polymerising agent. `underset("Buta-1,3-diene")(nCH_(2))=CH- CH_(2) +underset("Styrene")underset(C_(6)H_(5))underset(|)(NCH) = CH_(2) overset(NA) to underset("Buna-S")((-CH_(2) - CH =CH-CH_(2) - underset(C_(6)H_(5))underset(|)(CH) - CH_(2)-)_(n)` |
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