Table of Contents
International Journal of Carbohydrate Chemistry
Volume 2013, Article ID 463907, 15 pages
Research Article

Certain Rheological Aspects of Functionalized Guar Gum

1Shriram Institute of Technology, Gautum Buddh Technical University, I.E.T. Campus, Sitapur Road, Lucknow 226 021, India
2Gautum Buddh Technical University, I.E.T. Campus, Sitapur Road, Lucknow 226 021, India

Received 16 January 2013; Accepted 6 March 2013

Academic Editor: R. J. Linhardt

Copyright © 2013 Meenu Kapoor et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Guar gum and its derivatives are highly important industrial hydrocolloids as they find applications in various industrial sectors. Guar is a polymer of high molecular weight and its aqueous solutions exhibit unique rheological properties, which has led to its wide acceptance by the industry. In certain industrial applications low molecular weight guar and its derivatives are needed, and conventionally chemical depolymerisation of guar is carried out for this purpose. Radiation processing is a novel and green technology for carrying out depolymerization and can be an ideal substitute for chemical depolymerisation technique. In order to study the effect of radiation on guar derivatives, three types of derivatives have been taken in the present study: carboxymethyl, hydroxyethyl, and methyl guar. The effect of 1–50 KGy radiation dose on the rheological behavior of these derivatives has been studied, and the results have been described in the present paper. The effect on storage and loss modulus with respect to frequency and effect on viscosity with respect to shear rate have been discussed in detail.