Depolymerization of Poly(ethylene terephthalate) Waste Using 1,4-Butanediol and Triethylene Glycol

Abstract

Polyethylene terephthalate (PET) wastes were depolymerized using 1,4-butanediol (BD) and triethylene glycol (TEG) in the presence of zinc acetate as a transesterification catalyst. The glycolyzed products were analyzed for hydroxyl and acid values and identified by elemental analysis, GPC, ¹H NMR, ¹³C NMR, differential scanning calorimeter (DSC) and mass spectra techniques.

It was found that the glycolyzed products consist mainly of bis-(hydroxybutyl terephthalate) monomer and dimer by using 1,4-butanediol. The depolymerization using TEG resulted in products of TEG-(TPA- TEG)_n for n = 1−3. All glycolyzed products had a low acid value indicating the presence of a minor fraction of terephthalate oligoesters.

Get full access to this article

View all access options for this article.

References

1. Paszum, D. and Spychj, T. (1997). Ind. Eng. Chem. Res., 31: 1373 .

2. Grigat, E. (1978). Kunststoffe, 68: 281 .

3. Campanelli, J.R., Kamal, M.R. and Cooper, D. G. (1993). J. Appl. Poly. Sci., 48: 443 .

4. Campanelli, J.R., Cooper, D.G. and Kamal, M.R. (1994). J. Appl. Poly. Sci., 53: 985 .

5. Voss, D. (1989). Chem. Eng. Prog., 85: 67 .

6. De Winter, W., Marein, A. and Heirbout, W., Verheijen, J. (1992). Makromol. Chem. Macromol. Symp., 253.

7. Richard, R.E., Boon, W.H., Martin-Schultz, M. L. and Sisson, E. A. (1991). Polym. Prepr. (Am. Chem. Soc., Div. Polym. Chem.), 32: 144 .

8. Vaverka, J. V. (1994). Dissertation Abstract, DAI- Bs 3101, PS 44.

9. Gülclü, G., Kas Göz, A., Özbudak, S., Özgümüs, S. and Orbay, M. (1998). J. Appl. Poly. Sci., 69: 2311 .

10.

10. Vaidya, U.R., Nedkarni, V.M. (1987). Ind. Eng. Chem. Res., 26: 194 .

11.

11. Vaidya, U.R., Nedkarni, V.M. (1987). J. Appl. Poly. Sci., 34: 235 .

12.

12. Vaidya, U.R. and Nedkarni, V.M. (1988). J. Appl. Poly. Sci., 35: 775 .

13.

13. Baliga, S. and Wong, W.T. (1989). J. Appl. Poly. Sci. Part A: Polymer Chemistry, 27: 2071 .

14.

14. Suh, D.J., Park, O.O. and Yoon, K.H. (2000). Polymer, 41: 461 .

15.

15. Rebeiz, K.S., Serhal, S.P. and Flowler, D.W. (1995). J. Struct. Engng., 121: 1370 .

16.

16. Rebeiz, K.S. 1996. Adv. Perform. Mater., 3: 205 .

17.

17. Abdel-Azim, A. and Atta, A.M. (1997). Polym. J., 29: 21 .

18.

18. Aslan, S., Immirizi, B., Laurienzo, P., Malinconico, M., Martuscelli, E., Volpe, M.G., Pelino M. and Savini, L. (1997). J. Mater. Sci., 32: 2329 .

19.

19. Kacperski, M. and Spychaj, T. (1999). Polimery, 44: 1 .

20.

20. Sorenson, W.R. and Campbell, T.W. (1968). Preparative Methode of Polymer Chemistry, Interscience Publishers, A Division of John Wiley and Sons, New York, London, Sydney, Toronto , p. 155.

21.

21. Kyber, M., Schmidt, W., Schollar, U. (zimmer AG) U.S.US 5, 266, 601 (Cl. 521-48.5; C08j11/24) 30 Nov 1993, DE Appl. 4,220,473, 23 Jun (1992), 4pp. CA, 120: 136103q.

22.

22. Bursin, K., Frenzel, P. (1978). Die Angewandte Makromolekulare Chemie, 71: 61 .

23.

23. Passalacque, V., Pilati, F., Zamboni, V., Fortunato, B. and Manaresi, P. (1976). Polymer, 17: 1045 .