Chemical path to polyurethane polymer used in production of spandex. Spandex is principally composed of a polyurea derived within the reaction 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://peterc073kln2.mdkblog.com/profile