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Chemical route to polyurethane polymer Employed in production of spandex. Spandex is mainly made up of a polyurea derived from the reaction of the diol and a diisocyanate. Two classes of spandex are outlined by the "macrodiols". One course of macrodiols will be the oligomer made from tetra

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The essential characteristic of these molecules is that they're lengthy and versatile. This A part of the spandex fiber is chargeable for its stretching attribute. One other pre-polymer applied to make spandex is often a polymeric di-isocyanate. That is a shorter chain polymer, that has an isocy

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