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Unsaturated polyesters. III. Kinetics of polyesterification of cinnamylsuccinic acid with ethylene glycol
Author(s) -
Shaaban A. F.,
Salem M. A.,
Messiha N. N.
Publication year - 1987
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.1987.070330629
Subject(s) - ethylene glycol , catalysis , sulfonic acid , chemistry , kinetics , polyester , molar ratio , toluene , reaction rate constant , polymer chemistry , ethylene , organic chemistry , nuclear chemistry , physics , quantum mechanics
The polyesterification reactions of cinnamylsuccinic acid with ethylene glycol in both equimolar and nonequimolar ratios were investigated over the temperature range of 130–180°C in the absence and presence of p ‐toluene–sulfonic acid as a catalyst. The kinetic equations were: − d [COOH]/ dt = k 1 [COOH][OH] 2 and − d [COOH]/ dt = k 2 [COOH] 2 for uncatalyzed and acid‐catalyzed polyesterification reactions, respectively. The apparent rate constants for uncatalyzed and acid‐catalyzed reactions were evaluated by using the method of least squares for various values of initial molar ratios between [OH] and [COOH]. Also, the activation parameters were calculated.