| http://www.w3.org/ns/prov#value | - The first step in a common method of producing a polyester such as polyethylene terephthalate (PET) is an esterification or ester-exchange stage where a diacid (typically terephthalic acid) reacts with an appropriate diol (typically ethylene glycol) to give a bis(hydroxyalkyl)ester and some linear oligomers.
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