Model esterification of neopentyl glycol and trimethylol propane with 1,4‐ tert ‐butyl benzoic acid | Zendy

McCarthy Jennifer L. | Zendy; Scholtens Boudewijn J. R. | Zendy

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Model esterification of neopentyl glycol and trimethylol propane with 1,4‐ tert ‐butyl benzoic acid

Author(s) -

McCarthy Jennifer L.,

Scholtens Boudewijn J. R.

Publication year - 1991

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1991.070420812

Subject(s) - propane , benzoic acid , chemistry , titration , ethylene glycol , reaction rate constant , catalysis , medicinal chemistry , organic chemistry , kinetics , physics , quantum mechanics

The esterification kinetics of difunctional neopentyl glycol and trifunctional trimethylol propane with monofunctional 1,4‐ tert ‐butyl benzoic acid was studied in the melt phase at 200°C in the presence of a metal catalyst. The rate of conversion was monitored via titrations and by determination of the relative concentrations of products and reactants using HPLC with a UV detector. A small but significant positive substitution effect was found for neopentyl glycol ( K DA = 1.15) and none was found for trimethylol propane. The reaction rate constant of neopentyl glycol with the acid is about 40% higher than that of trimethylol propane with the acid. A second‐order overall reaction order was used to compute the rate constants.

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