Kinetics of polyesterification of 1,3-(dicarboxymethoxy) benzene with tetraethylene glycol
Article first published online: 9 MAR 2003
Copyright © 1989 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 38, Issue 7, pages 1357–1367, 5 October 1989
How to Cite
Shaaban, A. F., Moustafa, H. Y. and Messiha, N. N. (1989), Kinetics of polyesterification of 1,3-(dicarboxymethoxy) benzene with tetraethylene glycol. J. Appl. Polym. Sci., 38: 1357–1367. doi: 10.1002/app.1989.070380714
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Accepted: 8 SEP 1988
- Manuscript Received: 16 FEB 1988
The polyesterification of 1,3-(dicarboxymethoxy)benzene with tetraethylene glycol in both equimolar and nonequimolar ratios were studied over the range of 120–160°C in the absence and presence of p-toluenesulphonic acid as catalyst. The experimental results for uncatalyzed reactions agreed quite well with the kinetic equation proposed by Flory. The kinetic equations for acid-catalyzed reactions, however, are in agreement with the kinetic equation proposed by Lin and Hsieh. The kinetic equations were −d[COOH]/dt = k1[COOH]2[OH] and −d[COOH]/dt = k2[COOH]2 for uncatalyzed and acid-catalyzed polyesterfications, respectively. The rate constants for uncatalyzed and acid-catalyzed reactions were calculated by using the method of least squares for various values of initial molar ratio between [OH] and [COOH]. Also, the activation energies were calculated.