Home›Science›Chemistry (continued)›What is Addition Polymer?
◉ Science·2 min·Updated Mar 14, 2026

What is Addition Polymer?

Addition Polymer

Quick Answer

An addition polymer is a type of polymer formed by the direct joining of monomers without the loss of any small molecules. This process involves the opening of double bonds in the monomers, allowing them to link together into long chains. Common examples include polyethylene and polystyrene, which are widely used in everyday products.

Overview

Addition polymers are created when small molecules called monomers join together through a chemical reaction. This reaction usually involves unsaturated monomers, which contain double bonds. When these double bonds open up, they allow the monomers to connect, forming long chains that make up the polymer. The process of making addition polymers is significant in chemistry because it leads to the creation of many materials that we use daily. For example, polyethylene, which is made from the polymerization of ethylene gas, is used in plastic bags and bottles. These materials are lightweight, durable, and can be produced in large quantities, making them very useful in various industries. Understanding addition polymers is essential for advancements in material science and engineering. They can be tailored for specific applications by changing the types of monomers used or by altering the conditions of the polymerization process. This flexibility allows for innovation in creating new materials that meet specific needs, such as biodegradable plastics or stronger composites.

Frequently Asked Questions

Common examples include polyethylene, which is used in plastic bags, and polystyrene, found in foam containers. Other examples are polyvinyl chloride (PVC), used in pipes, and polyacrylonitrile, used in textiles.
Addition polymerization differs from condensation polymerization, where small molecules are lost during the reaction. In addition polymerization, monomers simply link together without losing any atoms, which makes the process straightforward and efficient.
Addition polymers are crucial because they are used to create many everyday items, from packaging materials to household products. Their versatility and durability make them integral to modern manufacturing and consumer goods.