Chemical Recycling of Rigid Polyurethane Foam Scrap via Base Catalyzed Aminolysis

Authors

  • Saowaroj CHUAYJULJIT Department of Materials Science, Faculty of Science, Chulalongkorn University
  • Chaiwat NORAKANKORN Department of Materials Science, Faculty of Science, Chulalongkorn University
  • Vimolvan PIMPAN Department of Materials Science, Faculty of Science, Chulalongkorn University

Keywords:

aminolysis, 4,4′-methylenedianiline, polyurethane, chemical recycling

Abstract

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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References

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.

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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.

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Published

2022-08-21

How to Cite

[1]
S. CHUAYJULJIT, C. NORAKANKORN, and V. PIMPAN, “Chemical Recycling of Rigid Polyurethane Foam Scrap via Base Catalyzed Aminolysis”, J Met Mater Miner, vol. 12, no. 1, pp. 19–22, Aug. 2022.

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Original Research Articles

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