Poly(tetrahydrofuran) (PTHF) is a synthetic polymer made from the polymerization of tetrahydrofuran, a cyclic ether. It is known for its flexibility, elasticity, and resistance to various chemicals, making it useful in a range of applications, including adhesives, coatings, and elastomers. PTHF can be produced in different molecular weights, which affects its properties and uses. It is often utilized in the production of thermoplastic elastomers and as a soft segment in polyurethanes, enhancing their performance and durability in various industrial applications.