This chemical process completely transforms the starting materials into something entirely new. A simple gas or a thin liquid can turn into a tough solid. The new polymer chain has physical properties that differ wildly from the original monomers.
Chemists trigger this chain reaction using heat, pressure, or special chemicals called catalysts. There are two primary mechanisms for how this molecular linking actually happens. In addition polymerization, monomers simply add to each other without losing any individual atoms.
This specific reaction usually involves breaking reactive double bonds between adjacent carbon atoms. During condensation polymerization, monomers join together and release a tiny byproduct molecule like water. Polymerization is a fundamental process in modern synthetic chemistry.
Factories use these reactions to manufacture everyday plastics, resins, and synthetic rubber. This same chemical reaction is equally important in the field of biochemistry. Nature uses this exact same concept to build the large molecules needed for life.
Amino acids link together sequentially to form complex and essential proteins. Nucleotides connect in incredibly long chains to build human DNA strands. Students often mistakenly think that polymers are only artificial plastics created in labs. In reality, natural polymers exist inside every single living cell on Earth.