NEW STEP BY STEP MAP FOR WHAT IS SPANDEX YARN

Chemical route to polyurethane polymer used in manufacture of spandex. Spandex is especially made up of a polyurea derived from your response of the diol and a diisocyanate. Two classes of spandex are outlined with the "macrodiols". A single class of macrodiols could be the oligomer generated from tetrahydrofuran (i.We gather info from you when you