XII Chemistry BIEK Topic - Polymerization (Short Note)

Polymerization (Short Note)
Definition
The phenomenon in which simple and small molecules are converted into large and complex molecules is known as Polymerization.

The simple and small molecules are known as monomer, where as large and complex molecules are called polymers.

Classification of Polymerization
Polymerization has been classified the following.

1. Addition Polymerization

2. Condensation Polymerization


1. Addition Polymerization

The process of Polymerization in which molecules are added into each other is called Addition Polymerization.


Examples

In presence of traces of oxygen when is heated at about 200ºC under 100 atm pressure, then Polymerization takes place. As a result, monomers add together to form polymer i.e. Polyethene or Polythene.

Diagram Coming Soon
Similarly the Polymerization of Vinyl Chloride to Poly Vinyl Chloride (PVC) and Polymerization of Vinyl Acetate to Poly Vinyl Acetate (PVA) are the examples of Addition Polymerization.


2. Condensation Polymerization

The process of Polymerization in which removal of water molecule takes place with the formation of polymer is called Condensation Polymerization.


Example

Bakelite Plastic is the Polymer that is obtained by the polymerization of Phenol and formaldehyde. During this process removal of water molecule takes place.