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The chemical structure of polyester

Polyester is the basic material of polyethylene terephthalate, molecular formula/OC - Ph - COOCH2CH2O - n, because there are many molecular chain ester base the said polyester (PET), its chemical structural formula of long-chain molecules for H (OCH2CCOCO) NOCH2CH2OH, used for fiber polyester relative molecular weight is in commonly 18000 ~ 25000, wool-like polyester with low molecular weight, high molecular weight polyester industry. In fact, with a small amount of monomer and oligomer. The oligomer with low polymerization degree, and form in a circular fashion. Polyethylene terephthalate oxalic ester can be made of terephthalic acid (PTA) and ethylene glycol (EG) take by direct esterification of terephthalic acid after 9 bhet oxalic ester) polycondensation.


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