Polímeros: Ciência e Tecnologia
https://www.revistapolimeros.org.br/article/doi/10.1590/0104-1428.2180
Polímeros: Ciência e Tecnologia
Scientific & Technical Article

Kinetic behavior of the reaction between silica and epoxidized liquid rubber

Braum, Marcus Vinícius; Jacobi, Marly Antônia Maldaner

Downloads: 0
Views: 447

Abstract

The use of epoxidized rubber as compatibilizer in silica-filled rubber compounds has been proposed in literature. However, the investigation of the reaction kinetics between the epoxy groups and the hydroxyl groups at the silica surface is not yet described. It is a difficult task, mainly because of the high dilution of the system due the difficulty of incorporating high levels of silica in a matrix containing epoxidized rubbers of high molecular weight. In this work, a mixture of precipitated silica and an epoxidized liquid rubber (EpLHPB) was prepared and the reaction between silanols and epoxy groups was followed by DSC under isothermal conditions, at 150, 160 and 170 °C. An autocatalytic data treatment was applied to determine the kinetic parameters of the reaction. Furthermore, it was possible to estimate the amount of epoxy groups required for the saturation of the external surface of the silica, resulting in 5.4 epoxy groups/nm2.

Keywords

composites, epoxidized rubber, kinetics, silanols, silica.

References

1. Byers, J. T. (2002). Fillers for balancing passenger tire tread properties. Rubber Chemistry and Technology, 75(3), 527-548. http://dx.doi.org/10.5254/1.3547681.

2. Vilgis, T., Heinrich, G., & Klüppel, M. (2009). Reinforcement of polymer nano-composites: theory, experiments and applications. Cambridge: Cambridge University Press.

3. Dierkes, W. (2005). Economic mixing of silica-rubber compounds (Doctoral thesis). University of Twente, Enschede.

4. Luginsland, H.-D. (1999). Processing of the organo silane Si 69. In Proceedings of the RubberChem ’99. Antwerp: Rapra.

5. Rocha, T. L. A. C., Schuster, R. H., Jacobi, M. M., & Samios, D. (2004). Influence of epoxidation on physical properties of SBR and its interaction with precipitated silica. Kautschuk und Gummi, Kunststoffe, 57(12), 656-661. Retrieved in 17 April 2015, from http://www.kgk-rubberpoint.de/ai/resources/7bfb4c001c9.pdf

6. Jacobi, M. M., Braum, M. V., Rocha, T. L. A. C., & Schuster, R. H. (2007). Lightly epoxidized polybutadiene with efficient interaction to precipitated silica. Kautschuk und Gummi, Kunststoffe, 60(9), 460-466. Retrieved in 17 April 2015, from http://www.kgk-rubberpoint.de/texte/anzeigen/718

7. Saramolee, P., Sahakaro, K., Lopattananon, N., Dierkes, W. K., & Noordermeer, J. W. M. (2014). Comparative properties of silica- and carbon black-reinforced natural rubber in the presence of epoxidized low molecular weight polymer. Rubber Chemistry and Technology, 87(2), 320-339. http://dx.doi.org/10.5254/rct.13.86970.

8. Braum, M. V. (2006). Melhoria da interação polímero-carga através do uso de borracha de polibutadieno epoxidada (Master's dissertation). Universidade Federal do Rio Grande do Sul, Porto Alegre.

9. Wasantakorn, A. (2006). A Study on reaction of ENR with silicic acid. Journal of Research in Engineering and Technology, 3(1), 1-20. Retrieved in 17 April 2015, from http://anchan.lib.ku.ac.th/kukr/handle/ 003/19595

10. Berglund, L. A., & Kenny, J. M. (1991). Processing science for high performance thermoset composites. SAMPE Journal, 27(2), 27-37.

11. Nam, J., & Seferis, J. C. (1993). Application of the kinetic composite methodology to autocatalytic-type thermoset prepreg cures. Journal of Applied Polymer Science, 50(9), 1555-1564. http://dx.doi.org/10.1002/app.1993.070500909.

12. Brunauer, S., Emmett, P. H., & Teller, E. (1938). Adsorption of gases in multimolecular layers. Journal of the American Chemical Society, 60(2), 309-319. http://dx.doi.org/10.1021/ja01269a023.

13. Lippens, B. C., & de Boer, J. H. (1965). Studies on pore systems in catalysts: V. The t method. Journal of Catalysis, 4(3), 319-323. http://dx.doi.org/10.1016/0021-9517(65)90307-6.

14. Takahashi, M. F. K., & Polito, W. L. (1997). Aplicações da espectroscopia de infravermelho com Transformada de Fourier para especiação isomérica de polibutadienos hidroxilados utilizados na síntese de polímeros PU-Propelentes. Polímeros: Ciência e Tecnologia, 7(1), 37-43. http://dx.doi.org/10.1590/S0104-14281997000100007.

15. Rocha, T. L. A. C., Jacobi, M. M., Samios, D., Meier, J., & Schuster, R. H. (2004). Study of the epoxidation of polydiene rubbers part III: Influence of epoxidation on viscoelastic behavior of SBR and BR melts. Kautschuk und Gummi, Kunststoffe, 57(7-8), 377-384. Retrieved in 17 April 2015, from http://www.kgk-rubberpoint.de/texte/anzeigen/412

16. Sesták, J., & Berggren, G. (1971). Study of the kinetics of the mechanism of solid-state reactions at increasing temperatures. Thermochimica Acta, 3(1), 1-12. http://dx.doi.org/10.1016/0040-6031(71)85051-7.

17. American Society for Testing and Materials – ASTM. (2000). ASTM E2070-00: standard test method for kinetic parameters by differential scanning calorimetry using isothermal methods. West Conshohocken: ASTM International.

18. González-Garcia, F., Miguez, E., & Soares, B. G. (2005). Characterization of diglycidyl ether of bisphenol A / aliphatic polyamines systems. Polímeros: Ciência e Tecnologia, 15(4), 261-267. http://dx.doi.org/10.1590/ S0104-14282005000400010.

19. Zhuravlev, L. T. (2000). The surface chemistry of amorphous silica. Colloids and Surfaces. A, Physicochemical and Engineering Aspects, 173(1-3), 1-38. http://dx.doi.org/10.1016/S0927-7757(00)00556-2.

20. Bilyeu, B., Brostow, W., & Menard, K. P. (2001). Epoxy thermosets and their applications III. Kinetic equations and models. Journal of Materials Education, 23(4-6), 189-204. Retrieved in 17 April 2015, from http://www.unt.edu/LAPOM/publications/pdf%20articles/Lisa/epoxyJME3.pdf

21. Kenny, J. M. (1994). Determination of autocatalytic kinetic model parameters describing thermoset cure. Journal of Applied Polymer Science, 51(4), 761-764. http://dx.doi.org/10.1002/app.1994.070510424.
588371db7f8c9d0a0c8b4abf polimeros Articles
Links & Downloads

Polímeros: Ciência e Tecnologia

Share this page
Page Sections