poly(tetramethylene glycol)

Poly(tetramethylene glycol) (PTMG) is a linear polyether diol—a type of soft-segment polymer synthesized from tetrahydrofuran (THF) monomers—commonly used as a building block in polyurethane and elastomer formulations. It provides flexibility and elasticity to composite materials by serving as the soft phase in segmented polymers, enabling engineers to tune mechanical properties for applications requiring both resilience and strain tolerance. PTMG is valued in industrial elastomers, adhesives, and coatings where the balance between stiffness and damping is critical, and competes with polyethylene glycol (PEG) and polypropylene glycol (PPG) primarily on the basis of its tunable glass transition behavior and compatibility in polyurethane chemistry.