A-LevelChemistryPolymerisationOct/Nov 2018Paper 4 Q78 Marks
(a) Polyurethanes are polymers made by the reaction of a diisocyanate with a diol as shown. R¹ and R² are hydrocarbon groups. [Figure 7.0] Lycra® is a polyurethane formed from the diisocyanate P and HOCH2CH2OH. [Figure 7.1]
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