What is an initiator in the context of chemical reactions?

In the context of chemical reactions, particularly in polymer chemistry, an initiator is a key component that starts the chemical reaction. This substance is crucial in processes such as polymerization, where it helps to generate free radicals or ions that initiate the reaction of monomers to form polymers.

When an initiator is introduced to a mixture with monomers, it effectively triggers the reaction, leading to the formation of larger and more complex molecular structures. This process is fundamental in various applications, especially in nail technology, where manicure products like gels and acrylics rely on polymers for their durability and performance.

The distinction of an initiator from other options is significant as it does not hinder or stabilize reactions but actively facilitates the start of a chemical transformation.