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Hydrogels are three-dimensional polymeric networks of hydrophilic monomers. When at least some of the monomers are electrolytes, such networks are called polyelectrolyte hydrogels. This paper reports new experimental results for the swelling equilibrium of polyelectrolyte hydrogels consisting of the neutral monomer N-isopropyl acrylamide and the ionic comonomer sodium methacrylate in aqueous solutions...
Gels are crosslinked macromolecules (polymer networks). The crosslinking results in an elastic behavior of the polymer network. When the segments of the network contain hydrophilic groups, the gels are called “hydrogels”. Hydrogels respond to their surroundings by a volume change, i.e. they swell or shrink. This paper reports new experimental results for the swelling behavior of some nonionic, synthetic...
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