Which polymerisation occurs among the molecules containing double bond...
Addition polymerization takes place when the monomer molecule contains double carbon bonds, as in alkenes, or triple carbon bonds, as in alkynes. In this lesson we will consider alkene monomers.
View all questions of this test
Which polymerisation occurs among the molecules containing double bond...
Addition Polymerization
Polymerization is a process of joining smaller molecules known as monomers to form a large molecule called a polymer. Among the different types of polymerization, addition polymerization occurs among molecules containing double bonds. Let's understand this process in detail.
Definition of Addition Polymerization:
Addition polymerization is a type of polymerization in which monomers containing double bonds are joined together to form a polymer with a high molecular weight.
Process of Addition Polymerization:
The process of addition polymerization occurs in the following steps:
1. Initiation: In this step, a free radical initiator, such as benzoyl peroxide, is added to the monomer. This causes the formation of free radicals, which are highly reactive species.
2. Propagation: In this step, the free radicals react with the double bond of another monomer to form a new free radical. This chain reaction continues until all the monomers are consumed, and a polymer chain is formed.
3. Termination: In this step, the polymerization process is terminated by the combination of two free radicals, which leads to the formation of a stable molecule.
Examples of Addition Polymerization:
Some common examples of addition polymerization include polyethylene, polypropylene, and polystyrene. Polyethylene is formed by the polymerization of ethylene monomers, while polypropylene is formed by the polymerization of propylene monomers. Polystyrene is formed by the polymerization of styrene monomers.
Conclusion:
In conclusion, addition polymerization is a process that occurs among molecules containing double bonds. This process involves the initiation, propagation, and termination steps. Some common examples of addition polymers include polyethylene, polypropylene, and polystyrene.
Which polymerisation occurs among the molecules containing double bond...
Teflon , polythene , PAN all these contains double bonds and all the molecules containing double bond pocesses addition polymer.