Chemistry & Chemical Engineering

Chemistry & Chemical Engineering

Study of Rheology of Tannin obtained from flower buds of Terminalia chebula (Aralu) and formaldehyde reaction

Pages: 7  ,  Volume: 15  ,  Issue: 1 , October   2018
Received: 01 Nov 2018  ,  Published: 08 November 2018
Views: 9  ,  Download: 0


# Author Name
1 S Arasaretnam


The gelling and hardening reactions of tannin extracted from flower buds of Terminalia chebula with formaldehyde were analysed by parallel-plate rheometry techniques. In this study, a method to determine the rheological features of tannin-formaldehyde reactions both before and after the gel point was settled. The conversion from the liquid to solid state occurs at the gel point. Before the gel point, the zero shear viscosity can portray the behavior of the liquid resin. The value of this parameter rises as the polycondensation reaction proceeds, and at the gel point the weight average molecular mass turn into theoretically infinite.



[1]. Pizzi, A. In Wood Adhesives, Chemistry and Technology; Pizzi, A., Ed.; Marcel Dekker: New York, 1983; Vol. 1, Chapter 4.

[2]. Colleri, L. Le Fabbriche Italiane di Estratto di Castagno; Milanostampa S.p.A.: Farigliano (CN), Italy, 1989.

[3]. Garcia, R.; Pizzi, A. J Appl Polym Sci 1998, 70, 1083.

[4] .Garcia, R.; Pizzi, A. J Appl Polym Sci 1998, 70, 1093.

[5]. Garcia, R.; Pizzi, A.; Merlin, A. J Appl Polym Sci 1997, 65, 2623.

[6] . Garnier, S.; Pizzi, A.; Vorster, O. C.; Halasz, L. J Appl Polym Sci 2001, 81,1634.

[7]. Vinogradov, G. V.; Malkin, A. Y. Rheology of Polymers; Springer- Verlag: Berlin, 1980.

[8]. Malkin, A. Y.; Kulichikhin, S. G. Adv Polym Sci 1991, 101, 217–256.

[9].Naroditskaya, E. Y.; Khodzhaeva, I. D.; Kulichikhin, S. G.; Pozdnyakou, V. Y.;  Yunitskii,   I. N., Kireev, V. V.; Malkin, A. Y. Vysikomolek Soed B 1985, 27, 713.

[10].Malkin, A. Y.; Kulichikhin, S. G.; Kozhina, V. A.; Bolotina, L. M. Vysikomolek Soed A 1987, 29, 418.

[11]. Kulichikhin, S. G.; Demina, G. I.; Bokareva, E. Z.; Malkin, A. Y. Plastmassy 1980,1, 57.

[12]. Rossouw, D. duT.; Pizzi, A.; McGillivray, G. J Polym Sci Chem Ed 1980, 18, 3323.