1.

i) Explain the preparation of Buna-N. ii) Give an example for thermosetting polymer.

Answer»

Solution :a) i) BUNA -N is obtained by the copolymerization of 1,3- butadiene and acrylonitrile in the presence of a peroxide catalyst.
`underset("1,3-Butadiene")(nCH_(2)=C-CH=CH_(2))+underset("Acrylonitrile")(CH_(2)=CH-CN)overset("Peroxide")rarrunderset("Buna-N")([--CH_(2)-CH=CH-CH_(2)-overset(CN)overset("|")"CH"-CH_(2)--]_(n))`
II) BAKELITE.


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