Question

Neoprene is a polymer of which of the following?
A. Propene
B. Vinyl chloride
C. Chloroprene
D. Butadiene

Answer 1

Hint: Find out the structure of Neoprene. The structure gives a brief idea about what monomer could be used to form this polymer. The chemical and physical properties of neoprene can also be used to find similarities between the monomer and the polymer accounting for its formation from that particular monomer.

Complete answer:
Neoprene belongs to a family of synthetic rubbers. It has good elastic properties and exhibits good chemical stability.
We can write its structure as $ - ( C{H_2} - C\left( {Cl} \right) = CH - C{H_2})_n - $
From the structure of Neoprene, we can understand that the polymer is formed from polymerization of Chloroprene, which is a chlorine-substituted diene molecule. Neoprene is also known as poly chloroprene.
Chloroprene is a diene monomer. We can write the structure of Chloroprene as $C{H_2} = CH - C\left( {Cl} \right) = C{H_2}$ , free radical polymerization of Neoprene.

Hence, the monomer of Neoprene is Chloroprene i.e. option C.

Additional information:
Neoprene is an elastic polymer. It can maintain flexibility over a wide range of temperatures. It is widely used in manufacturing medical and sport support products. Unlike other materials that deteriorate over time, Neoprene maintains its shape and physical properties and provides support as well as comfort.

Note:
Free radical polymerization of chloroprene produces neoprene. This polymer is prepared by free radical emulsion polymerization in commercial production. Chloroprene, which is a diene molecule and potassium persulfate which is used as an initiator for the process are used to produce Neoprene.