1 POLYMER GELS Polymer gels are three-dimensional networks of polymer chains that can absorb large amounts of water or other solvents, forming a swollen, hydrophilic matrix. These materials can be transformed into different forms with unique properties.1, 2 Therefore, polymer gels are solid, have a wet and soft state, and can be deformed under certain conditions.3 Factors that cause deformation in polymer gels are divided into two main categories: physical and chemical.