What is the Difference Between Addition Polymerization and Condensation Polymerization?

The main difference between addition and condensation polymerization lies in the way monomers are combined to form polymers and the by-products generated during the process.

In addition polymerization:

• Polymers are formed by the addition of monomers with no by-products.
• Monomers must have either a double bond or triple bond.
• The addition of monomers results in the formation of the polymer.
• Common examples include PVC, polyethene, and Teflon.

In condensation polymerization:

• Polymers are formed due to the condensation of more than one different monomers, resulting in by-products such as water, ammonia, or HCl.
• Monomers must have two similar or different functional groups.
• The condensation reaction between monomers results in the formation of the polymer.
• Common examples include nylon, silicon, and bakelite.

Addition polymers are usually chemically inert and contain strong C-C bonds, making them non-biodegradable and difficult to recycle. In contrast, condensation polymers tend to be more biodegradable due to the weaker bonds in their backbone, which can be hydrolyzed.

Comparative Table: Addition Polymerization vs Condensation Polymerization

The main difference between addition and condensation polymerization lies in the reaction mechanism and the by-products formed during the process. Here is a table comparing the two types of polymerization:

Examples of addition polymers include polyethylene (PE) and polyvinyl chloride (PVC), which are formed by the polymerization of CH2CHCl. Examples of condensation polymers include bakelite, silicon, and polyester.