I am verifying the answers generated by an automatic system to the following question: what is Polyester in packaging PET
Suggested answer: Its monomer (bis-β-hydroxyterephthalate) can be synthesized by the esterification reaction between terephthalic acid and ethylene glycol with water as a byproduct, or by transesterification reaction between ethylene glycol and dimethyl terephthalate with methanol as a byproduct.
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