Sustainable Compatibilizers for Silica Reinforcement on Styrene Butadiene Rubber

Abstract:

Silica is a hydrophilic reinforcing filler for rubbers, whilst styrene butadiene rubber (SBR) is a hydrophobic synthetic rubber. The interaction between silica and SBR is relatively weak causing a poor silica dispersion inside the SBR matrix. The amide substances such as stearamide and oleamide have been used as additives to solve the problem of poor degree of silica dispersion. Both additives were laboratory prepared by reacting stearic acid and urea for stearamide; oleic acid and urea for oleamide. Each of those additives was compounded with SBR and other curing chemicals separately and vulcanized using a semi-efficient vulcanization formulation. It was found that both additives have acted as curative additives and plasticisers for the silica-reinforced SBR compound/vulcanisate. They have improved processing properties which have improved the coefficient of vulcanization of the silica-reinforced SBR. Based on the torsion properties; they also have a successful role as plasticisers which have the capabilities to reduce the viscousness and to improve the dispersion of silica reinforcing filler in the compound of SBR. The morphological (scanning electron microscopy) study has confirmed that the compound of SBR-silica with stearamide or oleamide has morphology images with better silica dispersion.

• Periodical: Nano Hybrids and Composites (Volume 45)
• Pages: 113-119
• DOI: https://doi.org/10.4028/p-QoR2Yt
• Online since: November 2024
• Authors: Indra Surya*, Johan Anto, Nabil Hayeemasae
• Keywords: Amide, Compatibilizer, Oleamide, Silica, Stearamide, Styrene-Butadiene Rubber

References

[1] N. Hayeemasae, Z. Sensem, I. Surya, K. Sahakaro, H. Ismail, Synergistic Effect of Maleated Natural Rubber and Modified Palm Stearin as Dual Compatibilizers in Composites based on Natural Rubber and Halloysite Nanotubes, Polymers, 12 (4) (2020) 766.

DOI: 10.3390/polym12040766

[2] V. Arrighi, I. McEwen, H. Qian, M. S Prieto, The glass transition and interfacial layer in styrene-butadiene rubber containing silica nanofiller, Polymers, 44 (2003) 6259–6266.

DOI: 10.1016/s0032-3861(03)00667-0

[3] I. Surya, N Hayeemasae, Oleamide as palm-oil based substance for silica-loaded styrene butadiene rubber compound: The cure and crosslinks behaviors, IOP Conference Series: Earth and Environmental Science, 1241 (2023) 012096.

DOI: 10.1088/1755-1315/1241/1/012096

[4] M. Akiba & A. Hashim, Vulcanization and crosslinking in elastomers, Progress in polymer science, 22 (3) (1997) 475-521.

DOI: 10.1016/s0079-6700(96)00015-9

[5] I. Surya, M. Marpongahtun, The NR/silica/silane composites: Study on the crosslinks behaviour and tensile strength, AIP Conference Proceedings, 2626 (1) (2023) 040016.

DOI: 10.1063/5.0136043

[6] McKinney K, Michele and F.C. Benjamin, Structure and function of fatty acid amide hydrolase, Annual Review of Biochemistry, 74 (1) (2005) 411-432.

DOI: 10.1146/annurev.biochem.74.082803.133450

[7] I. Surya, J. Anto, The properties of hardness and swelling of styrene butadiene rubber/silica/ oleamide composites, IOP Conference Series: Earth and Environmental Science, 1188 (1) (2023) 012015.

DOI: 10.1088/1755-1315/1188/1/012015

[8] I. Surya, M. Ginting, Studying on the carbon black-reinforced styrene butadiene rubber: Effect of stearamide adding on the rheological behavior, AIP Conference Proceedings, 2626 (1) (2023) 130003.

DOI: 10.1063/5.0136050

[9] I. Surya, M. Ginting, The silica-filled polychloroprene rubber in the addition of alkanolamide: tensile and vulcanization properties, IOP Conference Series: Materials Science and Engineering 801 (1) (2020) 012089.

DOI: 10.1088/1757-899x/801/1/012089

[10] [A. A. Abdelsalam, A. Sherif, H. Salwa, S. H. El-Sabbagh, A. Abdelmoneim, A. H. Mohsen, Journal of Thermoplastic Composite Materials, 1 (18) (2019) 1-14.

[11] K.N. Hafni, I. Surya, NR/precipitated silica/dodecanol composites: Torque, hardness and morphology behaviors, IOP Conference Series: Materials Science and Engineering, 1122 (1) (2021) 012115.

DOI: 10.1088/1757-899x/1122/1/012115

[12] H. Yang, L. Yang, H. Guo, W. Hu, & A. Du, The effect of silica modified by deep eutectic solvents on the properties of nature rubber/silica composites, Journal of Elastomers & Plastics, (2021) 009524432110200.

DOI: 10.1177/00952443211020051

[13] H. Ismail and H. Chia, European Polymer Journal, 34 (12) (1998) 1857-1863.

[14] K. Polmanteer, C. Lentz, Rubber Chemistry and Technology, 48 (5) (1975) 795-809.

[15] I. Surya, E. Edwin, J. Anto, AIP Conference Proceedings, 2221 (2020) 012094.

[16] H. Ismail and M. Mathialagan, Comparative study on the effect of partial replacement of silica or calcium carbonate by bentonite on the properties of EPDM composites, Polymer Testing, 31 (2) (2012) 199-208.

DOI: 10.1016/j.polymertesting.2011.09.002

[17] H. Nabil, H. Ismail, and A. Azura, Compounding, mechanical and morphological properties of carbon-black-filled natural rubber/recycled ethylene-propylene-diene-monomer (NR/R-EPDM) blends, Polymer Testing, 32 (2) (2013) 385-393.

DOI: 10.1016/j.polymertesting.2012.11.003