Chemical route to polyurethane polymer used in creation of spandex. Spandex is principally composed of a polyurea derived in the response of the diol plus a diisocyanate. Two classes of spandex are outlined by the "macrodiols". Just one class of macrodiols could be the oligomer made from tetrahydrofuran (i. The https://nazimf073kmm1.wikilentillas.com/user