Question

Which of the following polymers has ester linkage?
A.Nylon 6,6
B.Dacron
C.PVC
D.Bakelite

Answer 1

Hint:For the formation of any type of polymer two monomers which can be same or different, polymerize and form polymer. The options given above are all polymers but the linkage is different. Some have amide linkage and some have ester linkage. In an ester molecule, the bond connecting the atom doubly bonded to oxygen and the oxygen atom bearing the alkyl or aryl group is therefore called the ester bond or ester linkage.

Complete step-by-step answer:Polymers are poly chains of monomers, these combine and eliminate a water molecule. In many cases amide linkage is formed while in many cases ester linkage is formed. So, for considering the linkage we firstly have to see the structure of these polymers.
Let’s start with Nylon 6,6 if we draw the structure of Nylon 6, 6 we can see that it has amide linkage it means that the monomers which are hexamethylenediamine and adipic acid combine and lose a water molecule.

Next we have Dacron which is a polymer made up of two monomers, ethylene glycol and terephthalic acid. There is an ester linkage in the structure. It can be represented as

Acid and an alcohol react and a water molecule is removed, and an ester molecule is formed. Because of this ester formation, this bond is referred to as an ester linkage. As you are seeing in the above figure, Dacron forms ester linkage. It is also called Terylene.
PVC also does not have an ester linkage. PVC is poly vinyl chloride it is formed when using the same monomer polymerise, we can see the structure of PVC polymer. It is mainly used in manufacturing pipes.

At last we have Bakelite and it also has the same type of linkage as PVC has. The two benzyl groups are connected as $ - C{H_2} - \,linkage$ . Thus according to the question we have to find out the polymer which has ester linkage. As we have seen the structure of all polymer we can say that
Correct option is B.

Note:Before being able to solve the sum, we need to understand the meaning of ester linkage. When a carboxylic acid and an alcohol react, a water molecule is removed, and an ester molecule is formed. Because of this ester formation, this bond is referred to as an ester linkage. There are many polymers which have ester linkage in them. For example PHBV .