Write the names and structures of the monomers of the following polymers:

(i) Buna-S (ii) Buna-N (iii) Dacron (iv) Neoprene

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Solution

The names and structures of monomers are given below:

Polymers Monomer Names Monomer Structures
(i) Buna-S 1,3-Butadiene
$C H_{2} = C H C H = C H_{2}$

Styrene $C_{6} H_{5} C H = C H_{2}$
(ii) Buna-N 1,3- Butadiene $C H_{2} = C H C H = C H_{2}$

Acrylonitrile $C H_{2} = C H C N$
(iii) Neoprene Chloroprene $\begin{matrix} C l | C H_{2} = & C & - C H = C H_{2} \end{matrix}$
(iv) Dacron Ethylene glycol $O H C H_{2} C H_{2} O H$

Terephthalic acid $p - H O O C - C_{6} H_{4} - C O O H$

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	Polymers	Monomer Names	Monomer Structures
(i)	Buna-S	1,3-Butadiene	$C H_{2} = C H C H = C H_{2}$
		Styrene	$C_{6} H_{5} C H = C H_{2}$
(ii)	Buna-N	1,3- Butadiene	$C H_{2} = C H C H = C H_{2}$
		Acrylonitrile	$C H_{2} = C H C N$
(iii)	Neoprene	Chloroprene	$\begin{matrix} C l \| C H_{2} = & C & - C H = C H_{2} \end{matrix}$
(iv)	Dacron	Ethylene glycol	$O H C H_{2} C H_{2} O H$
		Terephthalic acid	$p - H O O C - C_{6} H_{4} - C O O H$