lisandpolümerisatsiooniks

Lisandpolümerisatsiooniks is a chemical process where monomers add to one another in a way that the repeating unit in the polymer contains all the atoms of the monomer. This contrasts with condensation polymerization, where a small molecule, such as water, is eliminated during the process. In addition polymerization, there is typically no loss of small molecules, and the molecular weight of the polymer is an integer multiple of the molecular weight of the monomer. This type of polymerization often proceeds via a chain-growth mechanism, which can involve initiation, propagation, and termination steps. Common initiators include free radicals, cations, or anions. The double or triple bonds present in the monomers are usually the sites where the polymerization reaction occurs. Examples of polymers formed through addition polymerization include polyethylene, polypropylene, and polyvinyl chloride. The specific conditions, such as temperature, pressure, and the presence of catalysts, can significantly influence the rate of polymerization and the properties of the resulting polymer. The control over molecular weight and polymer architecture is a key aspect of industrial applications of addition polymerization.