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Define polymerization?

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Polymerization:Polymerization is defined as the chemical process in which the monomers are joined together to form polymers. Normally, it takes several thousands of monomers to make a single polymer.There are two types of polymerization:(a) Addition polymerisation: When the monomers are added together with the help of a catalyst it is known as addition polymerization.The formation of addition polymers occurs by the repeated addition of monomer molecules that possess triple or double bonds. For example, the formation of (${\left({\mathrm{C}}_{3}{\mathrm{H}}_{6}\right)}_{\mathrm{n}}$) polypropene from (${\mathrm{C}}_{3}{\mathrm{H}}_{6}$) propene, and (${\left({\mathrm{C}}_{2}{\mathrm{H}}_{4}\right)}_{\mathrm{n}}$) polythene from (${\mathrm{C}}_{2}{\mathrm{H}}_{4}$) ethene.(b) Condensation polymerization: When the monomers are added together with the byproduct and require two different types of monomers that join alternately, it is known as condensation polymerization.The formation of condensation polymers occurs by the repeated condensation reaction between two different tri-functional or bi-functional monomeric units. In this type of reaction, small molecules such as alcohol, water, hydrogen chloride, etc. are eliminated.Few examples, are nylon 6, nylon 6, 6, terylene (dacron), etc. The formation of nylon 6, 6 occurs due to the condensation of hexamethylene diamine (${\mathrm{C}}_{6}{\mathrm{H}}_{16}{\mathrm{N}}_{2}$) with adipic acid (${\mathrm{C}}_{6}{\mathrm{H}}_{10}{\mathrm{O}}_{4}$).

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