Chemical route to polyurethane polymer Employed in production of spandex. Spandex is especially composed of a polyurea derived within the reaction of the diol as well as a diisocyanate. Two lessons of spandex are outlined by the "macrodiols". One particular class of macrodiols would be the oligomer created from tetrahydrofuran https://mickg296tvw5.wikiworldstock.com/user