Modification of Silica as a Sealing Rubber Filler with Coupling Agents Hexamethyldisilazane (HDMS) and Methyltriethoxysilane (MTES)

Shely Octavania, Eneng Maryani, Hernawan Hernawan, Lintong Sopandi Hutahaean, Untung Prayudie

Abstract


Materials that can be used in the manufacture of LPG cylinder sealant rubber is silica. However, easily agglomerates so it is not compatible with rubber. Therefore, the silica surface must be modified to reduce agglomeration and improve compatibility with rubber. This study aims to determine the effect of silica modification on the characteristics of LPG cylinder sealing rubber produced. Silica modification is carried out using 2 (two) types of coupling agents, namely HMDS and MTES with and without Si-69. Preparation of rubber compound with SIR 20 raw material is carried out using an open mill tool with a modified silica filler dose of 40 phr. The characteristics of rubber tested were compound maturity test using a Rheometer and tensile strength and elongation at break using a Universal Testing Machine. The test results show that silica modification can accelerate the maturation time of the compound and increase the tensile strength and elongation at break. The maturation time of the rubber compound with silica filler modified by MTES and HMDS was 7 minutes 36 seconds and 7 minutes 53 seconds. The resulting tensile strength and elongation values are 18.8 MPa and 720% (MTES) and 19.0 MPa and 770% (HMDS). The use of MTES and Si-69 as coupling agent for silica produced rubber with tensile strength and elongation at break of 15.9 MPa and 660%.


Keywords


silica,filler, coupling agent , sealing rubber mechanical properties

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References


Arti, D. K., Fidyaningsih, R., Rohmah, A., Wisojodharmo, L. A., dan Purwati, H. (2018): Pengaruh variasi komposisi bahan pengisi carbon black dan silika pada sifat viskoelastis kompon karet untuk tread ban, Majalah Kulit, Karet, dan Plastik, 34, 1-8.

Azhari, dan Aziz, M. (2016): Sintesis dan karakterisasi material berpori berbasis mineral silika Pulau Belitung, Jurnal Teknologi Mineral dan Batubara, 12, 161-170

Balai Besar Keramik (2018): Laporan teknis pilot plant precipitated silika, Bandung.

Gun’ko, V. M., Vedamuthu, M. S., Henderson, G. L., dan Blitz, J. P. (2000): Mechanism and kinetics of hexamethyldisilazane reaction with a fumed silica surface, Journal of Colloid and Interface Science, 228, 157-170

Handayani, H., Faturrohman, M. I., Prastanto, H., Ramadhan, A., dan Kinasih, N. A. (2018): Sifat mekanik rubber seal katup tabung gas LPG pada variasi ukuran dan dosis silika, Jurnal Penelitian Karet, 36, 77-88

Hayichelaeh, C., Reuvekamp, L. A. E. M., Dierkes, W. K., Blume, A., Noordermeer, J. W. M., dan Sahakaro, K. (2018): Enhancing the silanization reaction of the silica-silane system by different amines in model and practical silica-filled natural rubber compounds, Polymers, 10, 1-16

Kapgate, B. P., Das, C., Basu, D., Das, A., dan Heinrich, G. (2015): Rubber composites based on silane-treated stober silica and nitrile rubber: Interaction of treated silica with rubber matrix, Journal of Elastomer & Plastics, 47, 248-261.

Lee, G. M., Yoo, J. W., dan Lee, K. B. (2014): Enhancement of dispersion of silica modified with silane coupling agent in a rubber composite, Journal of Chemical Engineering of Japan, 47, 159-164.

Mulia, A., Bahruddin, dan Irdoni (2015): Pengaruh kadar coupling agent maleated natural rubber terhadap morfologi dan sifat karet alam thermoset dengan filler abu sawit/carbon black, JOM FTEKNIK, 2, 1-10.

Nadargi, D. Y., Latthe, S. S., Hirashima, H., dan Rao, A. V. (2009): Studies on rheological properties of methyltriethoxysilane (MTES) based flexible superhydrophobic silica aerogels, Microporous and Mesoporous Material, 117, 617-626

Rahmaniar (2016): Karakteristik Karet Perapat Pada Katup Tabung LPG Menggunakan Bahan Pengisi Dari Pasir Kuarsa, Jurnal Dinamika Penelitian Industri, 27, 103-109.

Rahmaniar, dan Purbaya, M. (2019): Pengaruh komposisi dan ukuran partikel pasir kuarsa terhadap karakteristik vulkanisasi kompon, sifat ketahanan ozon, dan visual karet, Jurnal Dinamika Penelitian Industri, 30, 56-64.

Revuelta, M. V., Raap, M. B. F., Zelis, P. M., Sanchez, F. H., dan Castro, G. R. (2011): Ascorbic acid encapsulation in hydrophobic silica xerogel, Food Technology Biotechnology, 49, 347-351

Standar Nasional Indonesia 7655 (2010): Karet perapat (rubber seal) pada katup tabung LPG, Badan Standardisasi Nasional, Jakarta.

Theppradit, T., Prasassarakich, P., dan Poompradub, S. (2014): Surface modification of silica particles and its effects on cure and mechanical properties of the natural rubber composites, Materials Chemistry and Physics, 148, 940-948.

Thongpin, C., Sangnil, C., Suerkong, P., Pongpilaiprertti, A., dan Sombatsompop, N. (2009): The effect of Excess Silane Si-69 used for surface modification on cure characteristic and mechanical properties of precipitated silica filled natural rubber (Psi/NR), Advanced Materials Research, 79-82, 2171-2174.




DOI: http://dx.doi.org/10.32537/jkgi.v30i2.7407

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