{
    "content": "The monomers used for synthesizing hydrophilic polymers include dimethylol propionic acid (DMPA) and hydroxyethyl methyl acrylate (HEMA), where the carboxyl group in DMPA enhances hydrophilicity, promoting interactions with water through hydrogen bonding and ionic interactions, and the hydroxyl group in HEMA improves water affinity due to its ability to form hydrogen bonds with water molecules.The functional groups in the monomers, such as the hydroxyl group in hydroxyethyl methyl acrylate (HEMA) and the carboxylic acid group in dimethylpropionic acid (DMPA), enhance the hydrophilicity of the corresponding polymers by allowing for strong hydrogen bonding and ionic interactions with water, thereby facilitating water absorption and retention.The synthesis of hydrophilic polymers involved monomers with functional groups such as carboxyl groups from DMPA and hydroxyl groups from HEMA, which enhance hydrophilicity by promoting hydrogen bonding and ionic interactions with water.The text does not provide specific information about the monomer structures used for synthesizing hydrophilic polymers or details about the functional groups that enhance hydrophilicity."
}