How are Buna-S and nylon- $6, 6$ prepared? Give their uses.

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Solution

(a) Buna-S rubber
It is obtained by the polymerisation of butadiene and styrene in presence of sodium metal.
Uses: Buna-S is extremely resistant towards wear and tear and used for the manufacture of tyres, rubber tubes.
(b) Nylon-66
It is obtained by condensing adipic acid with hexamethylene diamine with the elimination of water molecule.
Uses: It is fabricated into sheets, bristles for brushes.

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