Relationship between swelling and mechanical properties of cross-linked polymers mixed with sand |
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| Institution: | 1. Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation;2. Department of Physics, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation;3. Department of Chemistry, Voronezh State University, 394018 Voronezh, Russian Federation;4. Eurasian Center for Food Security, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation |
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| Abstract: | Cross-linked polymers consisting of acrylamide, sodium acrylate, starch fragments and a cross-linker were synthesized with the same content of carboxyl groups and three degrees of cross-linking Q of 0.04, 0.2 and 1 wt%. An increase in Q gradually reduces the swelling of polymer gels in water; when distributed in sand, polymer gels exhibit maximum swelling at Q = 0.2 wt%. It is shown that the behavior of polymer gels in sand is determined by the balance between the elasticity of swollen polymer gels and the resistance of sand particles |
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| Keywords: | cross-linked polymers hydrogels sand swelling rheology |
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