Polytetramethylene Glycol (PTG) is a waxy, white solid that melts into a clear, colorless, viscous liquid near room temperature. PTG is produced by the catalyzed polymerization of tetrahydrofuran (THF). PTG is primarily used in the production of spandex (polyurethane) fibers, polyurethane elastomers, and copolyester-ether elastomers.
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