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The kinetics of polyesterification. I. Adipic acid and ethylene glycol

โœ Scribed by Chen Chong Lin; Kuo Huang Hsieh

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
352 KB
Volume
21
Category
Article
ISSN
0021-8995

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โœฆ Synopsis

The polyesterification between adipic acid and ethylene glycol in nonequimolar ratios was investigated. The kinetic equations obtained were quite different from those obtained by Flory in equimolar systems. The kinetic equations obtained in this study were -d[COOH]/dt = k [COOH] [OHI2 for uncatalyzed polyesterification and -d[COOH]/dt = k [COOHI* for catalyzed polyesterification. The mechanism of the polyesterification of a dibasic acid and a glycol can only be explained by the dissociation effect of hydrogen ion from dibasic acid in glycol.

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Solubility and esterification kinetics o
Solubility and esterification kinetics of terephthalic acid in ethylene glycol III. The effects of functional groups
โœ K. S. Yang; K. H. An; C. N. Choi; S. R. Jin; C. Y. Kim ๐Ÿ“‚ Article ๐Ÿ“… 1996 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 457 KB ๐Ÿ‘ 2 views

## 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