Question

Dacron (a polymer) is obtained by the condensation polymerization of:
A. Phenol and Formaldehyde
B. Phenol and phthalic acid
C. Terephthalic acid and Formaldehyde
D. Dimethyl terephthalate and ethylene glycol

Answer 1

Hint: Polymerization is a process in which monomers that are small molecules combine and produce a long chainlike molecule called a polymer. There are basically two types of polymerization, that are addition and condensation polymerization.

Complete answer:
- Condensation polymerization is generally where small monomers or we can say molecules react with each other to form polymers that are large structural units. And products like water or methanol is released.
- We can see that Dacron is obtained by the condensation polymerization of Dimethyl terephthalate and ethylene glycol.
- We can see the formation of Dacron from the reaction below:

Hence, we can conclude that the correct option is (D) that is Dacron (a polymer) is obtained by the condensation polymerization of Dimethyl terephthalate and ethylene glycol.

Additional information:
- There are various properties found in Dacron like, it is having high resistance to stretching, having high tensile strength.
- It is having wide range of applications, some of them are:
- It is used in manufacturing fibres for clothing.
- Used in making containers for foods and liquids.
- It is also found that Dacron has a wide application in the industrial field. It is used in industries to prepare drive belts and conveyor belts.

Note:
- We should not get confused in the condensation polymerization and addition polymerization. The main difference between both of these is that in condensation polymerization polymers are formed with release of several by products.
- Whereas, in addition polymerization polymers are formed without release of any by product.