olyvinyl alcohol (PVA) is a well-known synthetic polymer widely recognized for its excellent film-forming, emulsifying, and adhesive properties, along with its solubility in water. However, while unmodified PVA already finds extensive use across various industries, modified polyvinyl alcohol expands its range of applications and performance capabilities through chemical alterations tailored to specific needs.Modified polyvinyl alcohol refers to PVA that has undergone chemical or physical modifications to improve certain characteristics such as flexibility, water resistance, thermal stability, or compatibility with other materials. These modifications can include copolymerization, grafting, crosslinking, or derivatization with functional groups like carboxyl, sulfonic acid, or hydrophobic moieties.