Question

Synthetic human hair wigs are made from a copolymer of vinyl chloride and acrylonitrile and is called:
A) PVC
B) Polyacrylonitrile
C) Cellulose
D) Dynel

Answer 1

Hint: To answer this question, we must know about the copolymers. In the copolymers, two, or more different monomer units are used to make a polymer. Now, look at the given options, and their monomer units, the answer would be known. This is also used as a fabric and has high abrasion resistance.

Complete answer:
First, let us know about the copolymers. As mentioned it is composed of two, or more monomer units, and the process used to form copolymers is termed as copolymerization.
If we talk about the examples of copolymers, i.e. ABS (Acrylonitrile butadiene styrene), nitrile rubber, and PEVA (Polyethylene-vinyl acetate).
Now, let us see the given options, and their monomer units.
A) The first option is PVC i.e. polyvinyl chloride. It means that PVC is composed of the monomer units of vinyl chloride, so we can term it as a homopolymer.
B) The second option is Polyacrylonitrile. Now, in this case from the name itself we can say that it is composed of monomer units of acrylonitrile, and it is also a homopolymer.
C) We have the third option, i.e. cellulose. It is an organic polymer, and composed of the monosaccharide units of glucose. It is considered as the linear polysaccharide polymer.
D) Talking about the fourth option, i.e. Dynel. It is composed of vinyl chloride, and the acrylonitrile, and termed as copolymer.
In the last we can conclude that the synthetic human hair wigs are made from a copolymer of vinyl chloride and acrylonitrile i.e. Dynel.

Hence, the correct option is (D).

Note: Don’t get confused between the homopolymer, and copolymer. Homopolymers are composed of the same monomer units. While identifying the options, think carefully. In some options it is clear from the name itself i.e. homopolymer, or a copolymer.