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The kinetics of diethylene glycol formation in the preparation of polyethylene terephthalate

✍ Scribed by Jong-Wu Chen; Leo-Wang Chen

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
151 KB
Volume
36
Category
Article
ISSN
0887-624X

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✦ Synopsis

For revealing diethylene glycol (DEG) formation in poly(ethylene terephthalate) (PET) synthesis, this research focused on finding the stage most critical for DEG formation. It is found that the esterification stage was the most critical stage for DEG formation during production of PET through the direct esterification process. In addition, the kinetics of the formation of DEG (ether bond), which is mainly produced from hydroxyl end groups of ethylene glycol (EG) and bis-hydroxyethyl terephthalate (BHET) oligomer, was investigated. The results show that the reactivity of BHET-OH functional group is greater than that of EG-OH functional group in the reaction to produce ether bonds.

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