Question

Which of the following polymers is formed due to the co-polymerisation of 1, 3-butadiene and phenylethene?

Options

• Buna-N

• Neoprene

• Novalac

• Buna-S

Answer 1

Buna-S

Explanation:

Co-polymerisation of 1, 3-butadiene and phenylethene gives buna-S.

n CH₂ = CH – CH = CH₂ + n CH = CH – Ph

\[\begin{array}{cc}
\ce{[CH2 - CH = CH - CH2 - CH2 - CH]}\\
\phantom{...................................................}|\\
\phantom{.....................................................}\ce{Ph}
\end{array}\]