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Condensation polymerization is the process by which a polymer is formed using a condensation reaction. A condensation reaction occurs when two or more molecules add together followed by the loss of one or more small molecules. The most common molecules lost are water and hydrogen chloride gas. For example, the formation of the polymer in the following reaction is a condensation polymerization with water being the small molecule lost:
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n HOOCC6H4COOH + n HOCH2CH2OH ⇒[-OCC6H4COOCH2CH2O-]n + n H2O |