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, you must recall what copolymers are. In layman terms, a copolymer is a polymer which is formed by the combination of two or more different monomer units. Finding out the monomeric units of the polymers given in the question, we can find the answer.

Complete answer:
We know that copolymers are the polymers composed of two or more different monomer units and the process of the formation of copolymers is known as copolymerization. Some examples of copolymers are Acrylonitrile Butadiene Styrene (ABS), nitrile rubber and Polyethylene- vinyl acetate (PEVA).
Considering option A, we have PVC. PVC is short for Poly Vinyl Chloride. The name clearly tells us that it is made up of monomeric units of vinyl chloride. Thus, it is a homo polymer as all the monomeric units are the same.
Considering option B, we have Polyacrylonitrile which is known as PAN. In this case as well, we can clearly see from the name that it is made up of similar monomeric units of acrylonitrile. It is a homo polymer.
Considering option C, we have cellulose. It is an organic polymer consisting of glucose monosaccharide units. Cellulose is known as a linear polysaccharide polymer.
Considering option D, we have Dynel. It is a copolymer composed of the monomeric units, vinyl chloride and acrylonitrile. It is used as a fabric, has high abrasion resistance and for making synthetic hair wigs.

Thus, the correct answer is D.
Note:
You must have a clear distinction between homopolymer and copolymer. Homopolymer is made up of one type of monomeric unit whereas copolymer is made up of two or more different monomeric units and the two should not be confused.