## SYNOPSIS Clear time (tcl), the time required for the turbid mixture of terephthalic acid (TPA) and ethylene glycol (EG) to be clear, was measured to examine the effect of poly(ethy1ene terephthalate) (PET) prepolymer (DP of 1-5) on the kinetics of dissolution and/or esterification of TPA with E
Effect of diantimony trioxide on direct esterification between terephthalic acid and ethylene glycol
β Scribed by Toshiro Yamada
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 475 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0021-8995
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Pellets of poly(ethylene terephthalate) (PET; 0.48-1.92 g) were heated in anhydrous ethylene glycol (EG; 5 mL) with 2-equivs of NaOH at 150ΠC for 80 min or 180ΠC for 15 min to convert them quantitatively to disodium terephthalate (Na 2 -TPA) and EG. The disodium salt was precipitated quantitatively
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