Polyurethanes synthesized from polyester polyols derived from PET waste. III. Mechanical properties

Polyethylene terephthalate (PET) waste can be depolymerized by glycolysizing it with EG. Polyester polyol can then be obtained by reacting glycolysized products with adipic acid. Polyurethanes were then synthesized by reacting these polyester polyols with an isocyanate. Polyurethanes reacted with MDI indicated satisfactory elastomer characteristics. It is found that polyurethane having molecular weight of original polyol of approx1000 in a higher wt.% of hard segment (23.2) exhibits satisfactory elastomer characteristics, that can attain approx90 kg/cm exp 2 in tensile stress, with approx320% in the elongation, with the modulus of approx170 kg/cm exp 2 .