@Article{JPM.2020.37.1-2.5,
AUTHOR = {FATMA LOUZRI, SADJIA BENNOUR},
TITLE = {Swelling dynamics of Poly (N, N- Dimethylacrylamide - co- Crotonic acid) Hydrogel and Evaluation of its Potential for Controlled Release of Fertilizers},
JOURNAL = {Journal of Polymer Materials},
VOLUME = {37},
YEAR = {2020},
NUMBER = {1-2},
PAGES = {55--76},
URL = {http://www.techscience.com/jpm/v37n1-2/56059},
ISSN = {0976-3449},
ABSTRACT = {Poly(N,N-dimethymethylacrylamide -co-crotonic acid) (P(DMA-CAx)) hydrogels were prepared
by free radical polymerization, using N,N- methylenebisacrylamide (NMBA) as cross-linking
agent. The synthesized hydrogels were characterized by Fourier transform infrared spectroscopy
(FTIR) and thermogravimetric analysis (TGA). The effects of comonomer composition and pH
of the medium on the swelling behavior of hydrogels were investigated. The obtained results
showed that the swelling capabilities of hydrogels increased as crotonic acid content and pH
increased. In order to evaluate the controlled release potential of the polymeric matrix, it was
loaded with potassium nitrate and ammonium nitrate as fertilizers and the release kinetics was
studied as a function of the chemical composition of the hydrogel and the content of the
fertilizer. Various kinetic parameters such as the diffusion exponent and diffusion coefficient
were also determined. These pH sensitive copolymer hydrogels present a promising approach
for controlled release of fertilizers.},
DOI = {10.32381/JPM.2020.37.1-2.5}
}