Used in advanced polymer synthesis as a functional linker due to its long hydrophilic chain and reactive carboxylic acid end group. Its structure allows incorporation into amphiphilic copolymers for drug delivery systems, particularly in forming micelles that encapsulate hydrophobic drugs. The cyclooctenyl group enables click chemistry applications via ring-opening metathesis or photochemical reactions, making it valuable in bioconjugation and surface modification. Also employed in creating biodegradable hydrogels for tissue engineering, where the ether-oxygen rich segment enhances flexibility and water retention.