In Situ Silica Filled Styrene Grafted Natural Rubber by the Sol-Gel Process

Abstract:

In situ silica filling of styrene grafted natural rubber (ST-g-NR) was carried out by using sol-gel reaction of tetraethoxysilane (TEOS). The effects of concentration of catalyst and reaction temperature on the in situ silica content were investigated. ST-g-NR was synthesized via an emulsion polymerization using cumene hydroperoxide (CHPO) and tetraethylene pentamine (TEPA) as initiators. The synthesized ST-g-NR was characterized by a Fourier Transform Infrared Spectroscopy (FTIR) and Proton Nuclear Magnetic Resonance Spectroscopy (1H NMR). The content of in situ silica generated in ST-g-NR matrix was determined by Thermogravimetry Analysis (TGA). In situ silica up to 50 parts per hundred rubbers by weight (phr) was successfully filled in the ST-g-NR matrix. The silica content increased with the increase of n-hexylamine concentration. However, the effect of reaction temperature was insignificant to silica content.

• Periodical: Advanced Materials Research (Volumes 93-94)
• Pages: 525-528
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.93-94.525
• Online since: January 2010
• Authors: Torpong Sittiphan, Pattarapan Prasassarakich, Sirilux Poompradub
• Keywords: Graft Copolymer, In Situ Silica, Sol-Gel Process

References

[1] W. Arayapranee and G.L. Rempel: J. Appl. Polym. Sci. Vol. 110 (2008), p.2475.

[2] M. Schneider, T. Pith and M. Lambla: J. Appl. Polym. Sci. Vol. 62 (1996), p.273.

[3] S. Chuayjuljit, S. Moolsin and P. Potiyaraj: J. Appl. Polym. Sci. Vol. 95 (2005), p.826.

[4] S. Kohjiya and Y. Ikeda: Proc. Japan Academy. 76 (2000), p.29.

[5] Y. Ikeda and Y. Kameda: Sol-gel Sci. Tech. Vol. 31 (2004), p.137.

[6] Y. Ikeda, S. Poompradub, Y. Morita and S. Kohjiya: Sol-gel Sci. Tech. Vol. 45 (2008), p.299.

[7] Y. Ikeda and S. Kohjiya: Polymer. Vol. 38 (1997), p.4417.

[8] S. Kohjiya and Y. Ikeda: Sol-gel Sci. Tech. Vol. 26 (2003), p.495.