additiopolymerejä

Additiopolymerejä, also known as addition polymers, are a major class of polymers formed through an addition polymerization reaction. This process involves the joining of monomers without the loss of any atoms. The monomers typically contain double or triple bonds that break during the reaction, allowing them to link together in a chain. Unlike condensation polymers, no small molecule, such as water or methanol, is released as a byproduct.

The most common monomers for addition polymerization are alkenes, which have a carbon-carbon double bond. During the polymerization process, the pi bond in the double bond breaks, and each carbon atom forms a new single bond with an adjacent monomer. This results in a long, linear polymer chain. Examples of common addition polymers include polyethylene, polypropylene, and polyvinyl chloride (PVC). Polyethylene, formed from the monomer ethene, is widely used in plastic bags and films. Polypropylene, derived from propene, is found in containers and fibers. PVC, made from vinyl chloride, is used in pipes and window frames. The properties of the resulting addition polymer are heavily dependent on the structure of the monomer and the conditions of polymerization, such as temperature and pressure.