Chemical Recycling of Rigid Polyurethane Foam Scrap via Base Catalyzed Aminolysis
Keywords:aminolysis, 4,4′-methylenedianiline, polyurethane, chemical recycling
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.
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.
How to Cite
Copyright (c) 2002 The Journal of Metals, Materials and Minerals (JMMM)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Authors who publish in this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.