1,9-nonediol can react with organic acids, isocyanates, and anhydrides to form different types of derivatives. Low melting point and biodegradable polyesters synthesized through modification are used for food packaging, high-end fibers, and electrical insulation materials; The synthesized high-performance polyurethane elastomer has excellent crystallinity and high mechanical strength, and is used in the production of rubber, elastic fibers, and artificial leather automotive parts; It can also be used as a plasticizer for polyester, with high resistance to volatilization, low temperature, water, and oil.