chain polymerization

Chain polymerization is a polymerization process in which the monomers combine to form a polymer through a chain of reactions. This reaction begins with the formation of a radical by initiation, often by heat or light. The monomer then combines with the radical, resulting in the release of a new radical, which then adds another monomer. The process continues until either all monomers are consumed or chain termination by inhibition occurs.

An important factor in chain polymerisation is the choice of the initiator that initiates the formation of free radicals. Commonly used initiators include azo compounds, organic peroxides, and persulfates. Choosing the right initiator depends on the nature of the monomers, temperature, and other conditions.

Chain polymerisation is widely used to manufacture plastics and polymers as it is a cost effective and efficient method to produce large quantities of polymers. However, undesirable side reactions such as gelation or branching can occur during the polymerization. To avoid this, inhibitors such as phenols or copper ions can be added to suppress unwanted reactions.

Overall, chain polymerisation is an important process for the production of polymers and is of great importance in chemistry, materials science and engineering.