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.