Therefore, the aim of this work is to find optimal parameters for the BHET
yield, through PET glycolysis, minimizing the elements employed.
Among the various options of chemical recycling of PET, the hydrolysis is considered one that really contributes to the environment while the glycolysis is de most widely studied process due to the several applications of BHET
. Therefore, the purpose of this work was to study the viability and efficiency of the glycolysis and hydrolysis processes using mild conditions.
For microwave-assisted synthesis of PET on the NPs surface, bis(2-hydroxyethyl) terephthalate (BHET
) and antimony oxide ([Sb.sub.2][O.sub.3]) as catalyst were used, both reagents from Sigma-Aldrich, with purity of 99.99%.
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Unlike our synthesis of PET from BHET
, which has an inherent 1:1 stoichiometry, the polycarbonate synthesis shown here requires a precise stoichiometric ratio of bisphenol-A (BPA) and diphenyl carbonate (DPC).
Lin and Baliga  reported a kinetic study on the polycondensation of bis(hydroxyethyl terephthalate), BHET
, monomer in the presence of antimony trioxide, [Sb.sub.2][0.sub.3], catalyst.
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Bis (2-hydroxyethyl terephthalate) (BHET
) is obtained at the end of this esterification reaction in first stage.
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Glycolysis of waste PET with ethylene glycol (EG) leads to the production of bis (2-hydroxyethylterephthalate) (BHET
) monomer which has been successfully used in the synthesis of a number of polymeric materials [6-8].
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