Used as a reactive polymer in coatings and adhesives due to its ability to form complexes with metals and acids. Commonly employed in gas separation membranes for its selective permeability to acidic gases like CO₂ and H₂S. Acts as a precursor in the synthesis of functional materials, including catalysts and ion-exchange resins. Applied in electronics as a component in photoresists and dielectric layers. Also utilized in biomedical fields for drug delivery systems and as a stabilizer for nanoparticles in aqueous solutions.