A repeat unit in the context of polymer chemistry refers to the smallest structural unit that repeats itself in a polymer chain. It is the basic building block of a polymer, contributing to the overall properties and characteristics of the material. In a synthetic polymer, the repeat unit is derived from the monomer(s) used in the polymerization process. For example: - In polyethylene, the repeat unit is -CH2-CH2- derived from the ethylene monomer (C2H4).
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