Used as a reactive polymer in coatings and adhesives due to its ability to form complexes with metals and cross-linking agents. Employed in gas separation membranes for its selective permeability to acidic gases like CO₂. Serves 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 support in solid-phase synthesis.