The reactions in the polyesterification of terephthalic acid with ethylene glycol

Vladimirova, M. P.; Kiselev, V. V.; Malykh, V. A.; Chegolya, A. S.

doi:10.1007/bf00546590

Cited by 1 publication

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mass balance for each reagent is good. Quite similar products have been described in the polyesterification between terephthalic acid and ethylene glycol. − Therefore, we can conclude that (i) both reaction routes (Schemes and ) are equally possible and probable and (ii) the smoothed molar concentrations and those estimated here for some species agree quite well.…”

Section: Discussion Of Resultssupporting

confidence: 82%

“…The formation of the AE/ea monoester has been described in the polyesterification between terephthalic acid and ethylene glycol, not only without but also with catalysts. , In a similar process Krumpolc et al have detected the presence of AE/ee/EA structures. To gain more insight into the mechanism and the kinetics of this polyesterification, Vladimirova et al …”

Section: Discussion Of Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of Polyesters as Binders for Deinkable Inks. 4. Chemical Kinetic Modeling of Copolyesterification between o-Phthalic Anhydride, Oleic Acid, and Neopentyl Glycol in Bulk at 205 °C

López‐González¹,

Cudero²,

Barrales‐Rienda³

1998

J. Phys. Chem. B

View full text Add to dashboard Cite

The kinetics of the bulk copolyesterification at 205 °C between o-phthalic anhydride, oleic acid, and neopentyl glycol in a nonequimolecular ratio, ([−COOH]/[−OH]) = 0.7, and in the absence of an external catalyst has been investigated. From a practical point of view and to carry out the kinetic analysis of the present system, we have taken into account the following considerations: (i) After the initial mixing of reagents, the ring-opening reaction of the o-phthalic anhydride by a hydroxyl group is instantaneous. (ii) This is also the case even with two hydroxyl groups from the same neopentyl glycol molecule; that is they probably have almost the same reactivity toward the anhydride ring. (iii) The reaction of a carboxylic group originated according to consideration i with a second neopentyl glycol molecule is equally instantaneous, i.e., the reaction between one o-phthalic anhydride molecule and two neopentyl glycol molecules. (iv) Also, after the initial mixing, the reaction of a first molecule and a second molecule of oleic acid with a neopentyl glycol molecule to give an inactive compound is also instantaneous. The results establish that the overall kinetic order of the copolyesterification is third order. The copolyesterification is three-halves order in carboxylic and three-halves in hydroxyl group concentrations. A chemical kinetic model was developed for the copolyesterification of o-phthalic anhydride, oleic acid, and neopentyl glycol. The mechanism was based on very simple elemental reactions. All relevant reactions were considered, and a final selection of 12 reactions was made. The proposed 12-step reaction mechanism gives good agreement between experimental results and computer simulations.

show abstract