Write step growth polymerization.

1.	Write step growth polymerization.
Answer» Step-growth polymerizationrefers to a type ofpolymerizationmechanism in which bi-functional or multifunctionalmonomersreact to form firstdimers, thentrimers, longeroligomersand eventually long chainpolymers. Many naturally occurring and some synthetic polymers are produced by step-growth polymerization, e.g.polyesters,polyamides,polyurethanes, etc. Due to the nature of the polymerization mechanism, a high extent of reaction is required to achieve high molecular weight. The easiest way to visualize the mechanism of a step-growth polymerization is a group of people reaching out to hold their hands to form a human chain—each person has two hands (= reactive sites). There also is the possibility to have more than two reactive sites on a monomer: In this case branched polymers production take place

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