Write the equation for the reaction of obtaining lavsan from terephthalic acid and ethylene glycol.

Lavsan is also called polyethylene terephthalate. It is a hard substance that is dull in its shapeless state, and has a snow-white color in its crystalline state. It has high strength, water resistance, durability and deformation resistance. We get lavsan in the following way.
NCH2OH-CH2OH + nHOOC-C6H4-COOH = n [-CH2-OOC-C6H4 – COO-CH2-] n + nH2O.
That is, lavsan is obtained as a result of the reaction of terephthalic acid with ethylene glycol.

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