SYNTHESIS OF N,N-DIMETHYLACRYLAMIDE BASED HYDROGELS AND INVESTIGATION ITS SWELLING PROPERTIES

Kazakhstan is one of the biggest country in the world, but approximately 70 % of our land covered by desert. In addition, more landscapes are becoming desert due to lack of water resources. Structuring of soil with hydrogel is one of the known method that currently used in water-lack countries in the world. Thus, investigation of hydrogel with high water absorbing ability is one of the important problem in the world.
In this work hydrogels of N,N-dimethyl acrylamide and 2-Acrylamido-2-methyl-1-propanesulfonic acid monomers were synthesized by radical polymerization in presence of N,N-methylene bis acrylamide as a cross-linking agent and ammonium persulfate initiator.
The parameters affecting on the conversion of co-polymerization such as initial concentration of monomers, temperature, initiator dose and contact time were investigated. The swelling degree of the hydrogels was determined by adding different amount of cross-linker and initiator. As a result, the optimal conversion parameters were determined, such as the initiator concentration (0.07%), the cross-linker concentration (0,74%), the optimal temperature (60℃), and the co-polymerization time. The experimental data were reasonably described systematically. The resulted hydrogel could be used in different purposes in agriculture and seed coating etc.

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