Studies on renewable polyphenol-based cation exchange resins of moderately high capacity
Article first published online: 10 MAR 2003
Copyright © 1991 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 42, Issue 9, pages 2499–2508, 5 May 1991
How to Cite
Mitra, N. C., Banerjee, R. S. and Sarkar, A. (1991), Studies on renewable polyphenol-based cation exchange resins of moderately high capacity. J. Appl. Polym. Sci., 42: 2499–2508. doi: 10.1002/app.1991.070420915
- Issue published online: 10 MAR 2003
- Article first published online: 10 MAR 2003
- Manuscript Accepted: 25 JUL 1990
- Manuscript Received: 2 MAR 1990
Most of the commercially available ion exchange resins at present are either styrene–DVB-based or phenol-based and these are dependent on petroleum products. In view of the ever increasing demand for ion exchange resins and the petroleum crisis, the cost of these resins is going up in leaps and bounds. Although work on ion exchange resins based on naturally occurring tannins and similar materials have been reported in the literature, their low stability, insufficiently low exchange capacity, and similar other disadvantages come in the way of commercial exploitation of these products. In the present communication, studies on preparation and properties, viz., exchange capacity, hydration, swelling, stability, etc. of some effective cation exchange resins which have been obtained from a renewable natural resource of polyphenolic nature and some small proportion of phenol have been reported. The resins studied are stable and of moderately high exchange capacity (2–3 meq/g). Substituting phenol with low-priced renewable polyphenolic material, the resultant copolymer matrix after sulfonation gives ion exchange resins which are quite economic. Their properties are comparable with the commercial resins available in the market.