Swelling studies of copolymeric acrylamide/crotonic acid hydrogels as carriers for agricultural uses
✍ Scribed by Erdener Karadağ; Dursun Saraydin; Yasemin Çaldiran; Olgun Güven
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 162 KB
- Volume
- 11
- Category
- Article
- ISSN
- 1042-7147
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✦ Synopsis
In this study, highly swollen acrylamide/crotonic acid hydrogels (in a rod form) containing some inorganic salts such as ammonium nitrate, potassium nitrate and ammonium sulphate used as fertilizer, an agricultural drug such as Dalapon (sodium 2,2-dichloropropionate) and two crosslinkers such as ethylene glycol dimethacrylate and 1,4-butandiol dimethacrylate were prepared by copolymerization of acrylamide and crotonic acid with g-radiation. As a result of swelling tests, the influence of g-ray dose and relative content of crotonic acid on the swelling properties, the diffusional behavior of water, diffusion coefficients and network properties of the hydrogel systems were examined. Acrylamide/crotonic acid hydrogels containing these salts and agricultural drug were swollen in the range 2045±400% in water, while polyacrylamide hydrogels swelled in the range 660±700%. Water intake of hydrogels followed a nonFickian-type diffusion.