{
    "content": "The monomers used for synthesizing hydrophilic polymers include N-vinylpyrrolidone (NVP) and 2-hydroxyethyl-methacrylate (HEMA), where functional groups such as the pyrrolidone in NVP and the hydroxyl group in HEMA enhance hydrophilicity by increasing hydrogen bonding and dipole interactions with water.Monomers such as PVP, PHEMA, NVP, and HEMA contain functional groups like hydroxyl (-OH), amide (-C(O)NH-), and carboxylic acid (-COOH) that enhance the hydrophilicity of the corresponding polymers by forming hydrogen bonds and ionic interactions with water molecules, thereby increasing their affinity for water.The monomer structures used for synthesizing hydrophilic polymers include polyvinylpyrrolidone (PVP) and N-vinylpyrrolidone (NVP), which contain functional groups such as pyrrolidone that enhance hydrophilicity by enabling strong hydrogen bonding interactions with water.The monomers used for synthesizing hydrophilic polymers include acrylic acid, methacrylic acid, and other ethylenically unsaturated carboxylic acids, which contain functional groups such as carboxylates and amines that enhance hydrophilicity by increasing hydrogen bonding and ionic interactions with water."
}