Abstract
An experiment was conducted during 2000-2001 to study the effect of monomer concentration on swelling characteristics of grafted hydrogels. Six series of hydrogels synthesized by grafting acrylamide (monomer) on 6 natural polymer backbones, viz katira, carboxy methyl cellulose-sodium salt, tragacanth gum, gelatin, pectin and starch, revealed that the per cent add-on increased with monomer concentration. Except starch-g-PAam, per cent swelling was at its maximum at lower monomer concentrations but decreased at higher concentrations of monomer. In case of starch-g-PAam, swelling increased from 483% to 843% at 30°C with an increase in monomer concentration from 7.04 mmol to 70.40 mmol. The maximum swelling was found to be a function of the composition of the backbone, concentration of the grafted monomer and the temperature of the environment.
| Original language | English |
|---|---|
| Pages (from-to) | 493-495 |
| Number of pages | 3 |
| Journal | Indian Journal of Agricultural Sciences |
| Volume | 72 |
| Issue number | 8 |
| State | Published - 1 Aug 2002 |
| Externally published | Yes |
Keywords
- Grafting
- Hydrogels
- Moisture retention
- Monomer
- Natural polymers
- Polymer chemistry
- Swelling