Chemical route to polyurethane polymer used in creation of spandex. Spandex is principally composed of a polyurea derived with the reaction of the diol plus a diisocyanate. Two classes of spandex are defined because of the "macrodiols". 1 class of macrodiols may be the oligomer produced from tetrahydrofuran (i. You https://zalmayg184nno2.lotrlegendswiki.com/user