Chemical Recycling of Rigid Polyurethane Foam Scrap via Base Catalyzed Aminolysis
Keywords:
aminolysis, 4,4′-methylenedianiline, polyurethane, chemical recyclingAbstract
Rigid polyurethane foam scrap was depolymerized by aminolysis using diethylenetriamine (DETA) as a degrading agent and sodium hydroxide (NaOH) as both a reactant and catalyst. The reaction was done at 180oC for 70 minutes and yielded 4,4′-methylenedianiline (MDA). It was found that higher completion of depolymerization increased as the amount of NaOH increased. In contrast, the amount of MDA decreased due to the aminolysis of PU foam by MDA catalyzed with NaOH.
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Higashi, F., Taguchi, Y., Kokubo, N. and Ohta, H. 1981. Effect of Initiation Condition on the Direct Polycondensation Reaction Using Triphenyl Phosphite and Pyridine. J. Polym. Sci. Part A: Polym. Chem. 19 : 2745-2750.
Kanaya, K. and Takahashi, S. 1994. Decomposition of Polyurethane Foams by Alkanolamines. J. Appl. Polym. Sci. 51 : 675-682.
Odian, G. 1991. Principles of Polymerization. 3rd ed. New York, John Wiley and Sons.
Van Der Wal, H. R. 1994. New Chemical Recycling Process for Polyurethane. J. Reinf. Plast. Compos. 51 : 87-96.
Xue, S., Omoto, M., Hidai, T. and Imai, Y. 1994. Epoxy Materials Prepared from the Chemically Reclaimed Products of Waste Rigid Polyurethane Foam. Cell. Polym. 13 : 125-136.
Xue, S., Omoto, M., Hidai, T. and Imai, Y. 1995. Preparation of Epoxy Hardeners from Waste Rigid Polyurethane Foam and their Applications. J. Appl. Polym. Sci. 56 : 127-134.
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