Lisandumispolümeratsioonis

Lisandumispolümeratsioonis, also known as addition polymerization, is a fundamental type of polymerization reaction where monomers add to one another in such a way that the polymer contains all the atoms of the monomer. This process typically involves monomers with double or triple bonds, such as alkenes, which can undergo chain-growth polymerization. The reaction proceeds via a chain mechanism, usually initiated by free radicals, cations, or anions. In a free radical polymerization, an initiator molecule decomposes to form a free radical, which then attacks a monomer molecule, opening its double bond and creating a new radical. This process continues as more monomers add to the growing chain, propagating the reaction. The chain growth stops when two growing radicals combine or disproportionate, or when a radical reacts with an inhibitor. This method is widely used for the production of many common plastics, including polyethylene, polypropylene, and polyvinyl chloride. The structure of the resulting polymer is directly related to the structure of the monomer, with repeating units identical to the monomer.