Polímeros: Ciência e Tecnologia
https://revistapolimeros.org.br/article/doi/10.1590/0104-1428.1518
Polímeros: Ciência e Tecnologia
Scientific & Technical Article

Solid State Polymerization of PET/PC Extruded Blend: Effect of Reaction Temperature on Thermal, Morphological and Viscosity Properties

Mendes, Luis C.; Mallet, Isaac Albert; Cestari, Sibele Piedade; Dias, Frederico Gonçalves de A.; Pereira, Patricia S. C.

Downloads: 2
Views: 988

Abstract

A systematic study of solid state polymerization (SSP), concerning the melt extruded blend of poly(ethylene terephthalate)/polycarbonate (catalyzed PET/PC, 80/20 wt %), as a function of temperature range (180-190°C) for a fixed time (6 h) is presented. The materials obtained were evaluated by differential scanning calorimetry (DSC), thermogravimetry/derivative thermogravimetry (TG/DTG), optical microscopy (OM) and intrinsic viscosity (IV) analysis. After SSP, at all reaction temperatures, PET glass transition and heating crystallization temperatures slightly decreased, melting temperature slightly increased, while degree of crystallinity was practically invariable. The DTG curves indicated that, at least, three phases remained. The OM images revealed that the morphology is constituted of a PET matrix and a PC dispersed phase. In the interfacial region we noticed the appearance of structures like bridges linking the matrix and the dispersed domains. These bridges were correlated to the PET/PC block copolymer obtained during blending in the molten state. IV increased for all polymerization temperatures, due to the occurrence of PET chain extension reactions – esterification and transesterification. The IV range for bottle grade PET was achieved.

Keywords

SSP, PET/PC, blend, optical microscopy, thermal properties, viscosity.

References



1. Vouyiouka, S. N.; Filgueiras, V. & Papaspyrides, D. C. - J. Appl. Polym. Sci., 124, p.4457 (2012).

2. Agarwal, U. S.; De Wit, G. & Lemstra, P. J. - Polymer, 43, p.5709 (2002). http://dx.doi.org/10.1016/S0032-3861(02)00468-8

3. Bikiaris, D. N.; Achilias, D. S.; Giliopoulos, D. J. & Karayannidis, G. P. - Eur. Polym. J., 42, p.3190 (2006). http://dx.doi.org/10.1016/j.eurpolymj.2006.07.027

4. Schiavone, R. J. - J. Appl. Polym. Sci., 86, p.230 (2002). http://dx.doi.org/10.1002/app.10952

5. James, N. R.; Ramesh, C. & Sivaram, S. - Macromol. Chem. Phys., 202, p.1200 (2001). http://dx.doi.org/10.1002/1521- 3935(20010401)202:7<1200::AID-MACP1200>3.0.CO;2-C

6. Ma, Y.; Agarwal, U. S.; Sikkema, D. J. & Lemstra, P. J. - Polymer, 44, p.4085 (2003). http://dx.doi.org/10.1016/ S0032-3861(03)00408-7

7. Kim, J.; Dong, L. B.; Kiserow, D. J. & Roberts, G. W. - Macromolecules, 42, p.2472 (2009). http://dx.doi. org/10.1021/ma802193q

8. Kim, J. H. - J. Appl. Polym. Sci., 111, p.883 (2009).

9. Jansen, M. A. G.; Goossens, J. G. P.; de Wit, G.; Bailey, C.; Schick, C. & Koning, C. E. - Macromolecules, 38, p.10658 (2005). http://dx.doi.org/10.1021/ma051440j

10. Mendes, L. C.; Pereira, P. S. C. & Ramos, V. D. - Macromol. Symp., 299, p.183 (2011). http://dx.doi.org/10.1002/ masy.200900112

11. Pereira, P. S. C.; Mendes, L. C. & Ramos, V. D. - Macromol. Symp., 290, p.121 (2010). http://dx.doi.org/10.1002/ masy.201050414

12. Mendes, L. C.; Pereira, P. S. C.; Abrigo, R. E. R.; & Ramos, V. D. - J. Therm. Anal. Calorim., 99, p.545 (2010). http:// dx.doi.org/10.1007/s10973-009-0211-4

13. Pereira, P. S. C.; Mendes, L. C. & Abrigo, R. E. R. - Int. J. Polym. Mater., 57, p.494 (2008). http://dx.doi. org/10.1080/00914030701816045

14. Mendes, L. C. & Pereira, P. S. C. - Mater. Sci. App., 2, p.1033 (2011).

15. American Society for Testing and Materials - ASTM. - “Standard test method for determining inherent viscosity of poly(ethylene terephthalate) PET”, ASTM, Philadelphia (1994). (ASTM D 4603).

16. Gowd, E. B. & Ramesh, C. - Polymer, 46, p.7443 (2005). http://dx.doi.org/10.1016/j.polymer.2005.05.075

17. Mendes, L. C. & Pereira, P. S. C. - Polímeros, 23, p.298, 2013.

18. Martin, E. R. & Timothy, E. L. - “Synthetic methods in Step-Growth Polymers”, John-Wiley, New Jersey (2003).
588371b07f8c9d0a0c8b4a04 polimeros Articles
Links & Downloads

Polímeros: Ciência e Tecnologia

Share this page
Page Sections