- Accession Number
- 145VF-0011
- Document Delivery
- 145VF: Document Delivery available
- Authors
- Saraydin
D. Karadag
E. Guven
O.
- Title
- The releases of agrochemicals from radiation induced acrylamide crotonic
acid hydrogels
- Source
- Polymer Bulletin. 41(5):577-584, 1998 Nov.
- ISSN
- 0170-0839
- KeyWords Plus
- Sulfonated polystyrene. Copolymers. Growth.
- Abstract
- The aim of this work was to test the application of new copolymeric poly(acrylamide/
crotonic acid) (AAm/CA) hydrogels to agrochemicals (sodium 2,2
dichloropropionate (dalapon), ammonium nitrate, potassium nitrate and
ammonium sulfate) releases. AAm/CA hydrogels containing a,agrochemicals is
prepared by two different composition of crotonic acid and two different
gamma-rays doses. The herbiside such as sodium 2,2 dichloropropionate (dalapon)
and fertilizers such as ammonium nitrate, potassium nitrate and ammonium
sulfate were trapped in the gels by including it in the feed mixture of
radiation polymerization. The equilibrium swelling degree in water was
between 1020% and 1840%. The swelling kinetics of the hydrogels were studied
at 25 degrees C, and the initial swelling rate, swelling rate constant,
maximum swelling, diffusional exponent and diffusion coefficient of the
process were obtained. The concentration of the released of agrochemicals
from the hydrogels was determined by conductivity measurements. The initial
releasing rate, release rate constant, maximum concentration of releasing
agrochemicals were calculated. As a result, if AAm/CA hydrogels containing
agrochemicals were swelled in water, release of agrochemicals was increased
with the raising of crotonic acid quantities in the hydrogel and gamma-rays
doses. [References: 17]
- Language
- English
- Publication Type
- Article
- Subset
- Current Contents(R)/Physical, Chemical & Earth Sciences.
- CC Categories
- Organic Chemistry/Polymer Science in Current Contents(R)/Physical,
Chemical &Earth Sciences.
- Institution
- Reprint available from:
- Saraydin D
- Cumhuriyet Univ, Dept Chem
TR-58140 Sivas Turkey
- Cumhuriyet Univ, Dept Chem
TR-58140 Sivas Turkey
- Adnan Menderes Univ, Dept Chem
TR-09010 Aydin Turkey
- Hacettepe Univ, Dept Chem TR-06532 Ankara
Turkey