Chemical route to polyurethane polymer used in manufacture of spandex. Spandex is mainly composed of a polyurea derived from the response of a diol and also a diisocyanate. Two classes of spandex are outlined through the "macrodiols". One particular course of macrodiols could be the oligomer generated from tetrahydrofuran (i. https://samuelx840efg9.iamthewiki.com/user